20879040

素因数分解:

$2^6\times 3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{239}}^1$

素因数の和:279

約数の個数: 224

約数和(自身を含む): 81930240

約数和(自身を除く): 61051200

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 13, 14, 15, 16, 20, 21, 24, 26, 28, 30, 32, 35, 39, 40, 42, 48, 52, 56, 60, 64, 65, 70, 78, 80, 84, 91, 96, 104, 105, 112, 120, 130, 140, 156, 160, 168, 182, 192, 195, 208, 210, 224, 239, 240, 260, 273, 280, 312, 320, 336, 364, 390, 416, 420, 448, 455, 478, 480, 520, 546, 560, 624, 672, 717, 728, 780, 832, 840, 910, 956, 960, 1040, 1092, 1120, 1195, 1248, 1344, 1365, 1434, 1456, 1560, 1673, 1680, 1820, 1912, 2080, 2184, 2240, 2390, 2496, 2730, 2868, 2912, 3107, 3120, 3346, 3360, 3585, 3640, 3824, 4160, 4368, 4780, 5019, 5460, 5736, 5824, 6214, 6240, 6692, 6720, 7170, 7280, 7648, 8365, 8736, 9321, 9560, 10038, 10920, 11472, 12428, 12480, 13384, 14340, 14560, 15296, 15535, 16730, 17472, 18642, 19120, 20076, 21749, 21840, 22944, 24856, 25095, 26768, 28680, 29120, 31070, 33460, 37284, 38240, 40152, 43498, 43680, 45888, 46605, 49712, 50190, 53536, 57360, 62140, 65247, 66920, 74568, 76480, 80304, 86996, 87360, 93210, 99424, 100380, 107072, 108745, 114720, 124280, 130494, 133840, 149136, 160608, 173992, 186420, 198848, 200760, 217490, 229440, 248560, 260988, 267680, 298272, 321216, 326235, 347984, 372840, 401520, 434980, 497120, 521976, 535360, 596544, 652470, 695968, 745680, 803040, 869960, 994240, 1043952, 1304940, 1391936, 1491360, 1606080, 1739920, 2087904, 2609880, 2982720, 3479840, 4175808, 5219760, 6959680, 10439520, 20879040]

約数ペア:

[(1, 20879040), (2, 10439520), (3, 6959680), (4, 5219760), (5, 4175808), (6, 3479840), (7, 2982720), (8, 2609880), (10, 2087904), (12, 1739920), (13, 1606080), (14, 1491360), (15, 1391936), (16, 1304940), (20, 1043952), (21, 994240), (24, 869960), (26, 803040), (28, 745680), (30, 695968), (32, 652470), (35, 596544), (39, 535360), (40, 521976), (42, 497120), (48, 434980), (52, 401520), (56, 372840), (60, 347984), (64, 326235), (65, 321216), (70, 298272), (78, 267680), (80, 260988), (84, 248560), (91, 229440), (96, 217490), (104, 200760), (105, 198848), (112, 186420), (120, 173992), (130, 160608), (140, 149136), (156, 133840), (160, 130494), (168, 124280), (182, 114720), (192, 108745), (195, 107072), (208, 100380), (210, 99424), (224, 93210), (239, 87360), (240, 86996), (260, 80304), (273, 76480), (280, 74568), (312, 66920), (320, 65247), (336, 62140), (364, 57360), (390, 53536), (416, 50190), (420, 49712), (448, 46605), (455, 45888), (478, 43680), (480, 43498), (520, 40152), (546, 38240), (560, 37284), (624, 33460), (672, 31070), (717, 29120), (728, 28680), (780, 26768), (832, 25095), (840, 24856), (910, 22944), (956, 21840), (960, 21749), (1040, 20076), (1092, 19120), (1120, 18642), (1195, 17472), (1248, 16730), (1344, 15535), (1365, 15296), (1434, 14560), (1456, 14340), (1560, 13384), (1673, 12480), (1680, 12428), (1820, 11472), (1912, 10920), (2080, 10038), (2184, 9560), (2240, 9321), (2390, 8736), (2496, 8365), (2730, 7648), (2868, 7280), (2912, 7170), (3107, 6720), (3120, 6692), (3346, 6240), (3360, 6214), (3585, 5824), (3640, 5736), (3824, 5460), (4160, 5019), (4368, 4780)]