256234720

素因数分解:

$2^5\times 5^1\times 7^4\times {\mathrm{23}}^1\times {\mathrm{29}}^1$

素因数の和:95

約数の個数: 240

約数和(自身を含む): 762320160

約数和(自身を除く): 506085440

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 28, 29, 32, 35, 40, 46, 49, 56, 58, 70, 80, 92, 98, 112, 115, 116, 140, 145, 160, 161, 184, 196, 203, 224, 230, 232, 245, 280, 290, 322, 343, 368, 392, 406, 460, 464, 490, 560, 580, 644, 667, 686, 736, 784, 805, 812, 920, 928, 980, 1015, 1120, 1127, 1160, 1288, 1334, 1372, 1421, 1568, 1610, 1624, 1715, 1840, 1960, 2030, 2254, 2320, 2401, 2576, 2668, 2744, 2842, 3220, 3248, 3335, 3430, 3680, 3920, 4060, 4508, 4640, 4669, 4802, 5152, 5336, 5488, 5635, 5684, 6440, 6496, 6670, 6860, 7105, 7840, 7889, 8120, 9016, 9338, 9604, 9947, 10672, 10976, 11270, 11368, 12005, 12880, 13340, 13720, 14210, 15778, 16240, 18032, 18676, 19208, 19894, 21344, 22540, 22736, 23345, 24010, 25760, 26680, 27440, 28420, 31556, 32480, 32683, 36064, 37352, 38416, 39445, 39788, 45080, 45472, 46690, 48020, 49735, 53360, 54880, 55223, 56840, 63112, 65366, 69629, 74704, 76832, 78890, 79576, 90160, 93380, 96040, 99470, 106720, 110446, 113680, 126224, 130732, 139258, 149408, 157780, 159152, 163415, 180320, 186760, 192080, 198940, 220892, 227360, 228781, 252448, 261464, 276115, 278516, 315560, 318304, 326830, 348145, 373520, 384160, 397880, 441784, 457562, 522928, 552230, 557032, 631120, 653660, 696290, 747040, 795760, 883568, 915124, 1045856, 1104460, 1114064, 1143905, 1262240, 1307320, 1392580, 1591520, 1601467, 1767136, 1830248, 2208920, 2228128, 2287810, 2614640, 2785160, 3202934, 3660496, 4417840, 4575620, 5229280, 5570320, 6405868, 7320992, 8007335, 8835680, 9151240, 11140640, 12811736, 16014670, 18302480, 25623472, 32029340, 36604960, 51246944, 64058680, 128117360, 256234720]

約数ペア:

[(1, 256234720), (2, 128117360), (4, 64058680), (5, 51246944), (7, 36604960), (8, 32029340), (10, 25623472), (14, 18302480), (16, 16014670), (20, 12811736), (23, 11140640), (28, 9151240), (29, 8835680), (32, 8007335), (35, 7320992), (40, 6405868), (46, 5570320), (49, 5229280), (56, 4575620), (58, 4417840), (70, 3660496), (80, 3202934), (92, 2785160), (98, 2614640), (112, 2287810), (115, 2228128), (116, 2208920), (140, 1830248), (145, 1767136), (160, 1601467), (161, 1591520), (184, 1392580), (196, 1307320), (203, 1262240), (224, 1143905), (230, 1114064), (232, 1104460), (245, 1045856), (280, 915124), (290, 883568), (322, 795760), (343, 747040), (368, 696290), (392, 653660), (406, 631120), (460, 557032), (464, 552230), (490, 522928), (560, 457562), (580, 441784), (644, 397880), (667, 384160), (686, 373520), (736, 348145), (784, 326830), (805, 318304), (812, 315560), (920, 278516), (928, 276115), (980, 261464), (1015, 252448), (1120, 228781), (1127, 227360), (1160, 220892), (1288, 198940), (1334, 192080), (1372, 186760), (1421, 180320), (1568, 163415), (1610, 159152), (1624, 157780), (1715, 149408), (1840, 139258), (1960, 130732), (2030, 126224), (2254, 113680), (2320, 110446), (2401, 106720), (2576, 99470), (2668, 96040), (2744, 93380), (2842, 90160), (3220, 79576), (3248, 78890), (3335, 76832), (3430, 74704), (3680, 69629), (3920, 65366), (4060, 63112), (4508, 56840), (4640, 55223), (4669, 54880), (4802, 53360), (5152, 49735), (5336, 48020), (5488, 46690), (5635, 45472), (5684, 45080), (6440, 39788), (6496, 39445), (6670, 38416), (6860, 37352), (7105, 36064), (7840, 32683), (7889, 32480), (8120, 31556), (9016, 28420), (9338, 27440), (9604, 26680), (9947, 25760), (10672, 24010), (10976, 23345), (11270, 22736), (11368, 22540), (12005, 21344), (12880, 19894), (13340, 19208), (13720, 18676), (14210, 18032), (15778, 16240)]