261369920

素因数分解:

$2^6\times 5^1\times 7^2\times {\mathrm{79}}^1\times {\mathrm{211}}^1$

素因数の和:321

約数の個数: 168

約数和(自身を含む): 736640640

約数和(自身を除く): 475270720

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 64, 70, 79, 80, 98, 112, 140, 158, 160, 196, 211, 224, 245, 280, 316, 320, 392, 395, 422, 448, 490, 553, 560, 632, 784, 790, 844, 980, 1055, 1106, 1120, 1264, 1477, 1568, 1580, 1688, 1960, 2110, 2212, 2240, 2528, 2765, 2954, 3136, 3160, 3376, 3871, 3920, 4220, 4424, 5056, 5530, 5908, 6320, 6752, 7385, 7742, 7840, 8440, 8848, 10339, 11060, 11816, 12640, 13504, 14770, 15484, 15680, 16669, 16880, 17696, 19355, 20678, 22120, 23632, 25280, 29540, 30968, 33338, 33760, 35392, 38710, 41356, 44240, 47264, 51695, 59080, 61936, 66676, 67520, 77420, 82712, 83345, 88480, 94528, 103390, 116683, 118160, 123872, 133352, 154840, 165424, 166690, 176960, 206780, 233366, 236320, 247744, 266704, 309680, 330848, 333380, 413560, 466732, 472640, 533408, 583415, 619360, 661696, 666760, 816781, 827120, 933464, 1066816, 1166830, 1238720, 1333520, 1633562, 1654240, 1866928, 2333660, 2667040, 3267124, 3308480, 3733856, 4083905, 4667320, 5334080, 6534248, 7467712, 8167810, 9334640, 13068496, 16335620, 18669280, 26136992, 32671240, 37338560, 52273984, 65342480, 130684960, 261369920]

約数ペア:

[(1, 261369920), (2, 130684960), (4, 65342480), (5, 52273984), (7, 37338560), (8, 32671240), (10, 26136992), (14, 18669280), (16, 16335620), (20, 13068496), (28, 9334640), (32, 8167810), (35, 7467712), (40, 6534248), (49, 5334080), (56, 4667320), (64, 4083905), (70, 3733856), (79, 3308480), (80, 3267124), (98, 2667040), (112, 2333660), (140, 1866928), (158, 1654240), (160, 1633562), (196, 1333520), (211, 1238720), (224, 1166830), (245, 1066816), (280, 933464), (316, 827120), (320, 816781), (392, 666760), (395, 661696), (422, 619360), (448, 583415), (490, 533408), (553, 472640), (560, 466732), (632, 413560), (784, 333380), (790, 330848), (844, 309680), (980, 266704), (1055, 247744), (1106, 236320), (1120, 233366), (1264, 206780), (1477, 176960), (1568, 166690), (1580, 165424), (1688, 154840), (1960, 133352), (2110, 123872), (2212, 118160), (2240, 116683), (2528, 103390), (2765, 94528), (2954, 88480), (3136, 83345), (3160, 82712), (3376, 77420), (3871, 67520), (3920, 66676), (4220, 61936), (4424, 59080), (5056, 51695), (5530, 47264), (5908, 44240), (6320, 41356), (6752, 38710), (7385, 35392), (7742, 33760), (7840, 33338), (8440, 30968), (8848, 29540), (10339, 25280), (11060, 23632), (11816, 22120), (12640, 20678), (13504, 19355), (14770, 17696), (15484, 16880), (15680, 16669)]