28386280

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{691}}^1$

素因数の和:794

約数の個数: 64

約数和(自身を含む): 69753600

約数和(自身を除く): 41367320

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 79, 104, 130, 158, 260, 316, 395, 520, 632, 691, 790, 1027, 1382, 1580, 2054, 2764, 3160, 3455, 4108, 5135, 5528, 6910, 8216, 8983, 10270, 13820, 17966, 20540, 27640, 35932, 41080, 44915, 54589, 71864, 89830, 109178, 179660, 218356, 272945, 359320, 436712, 545890, 709657, 1091780, 1419314, 2183560, 2838628, 3548285, 5677256, 7096570, 14193140, 28386280]

約数ペア:

[(1, 28386280), (2, 14193140), (4, 7096570), (5, 5677256), (8, 3548285), (10, 2838628), (13, 2183560), (20, 1419314), (26, 1091780), (40, 709657), (52, 545890), (65, 436712), (79, 359320), (104, 272945), (130, 218356), (158, 179660), (260, 109178), (316, 89830), (395, 71864), (520, 54589), (632, 44915), (691, 41080), (790, 35932), (1027, 27640), (1382, 20540), (1580, 17966), (2054, 13820), (2764, 10270), (3160, 8983), (3455, 8216), (4108, 6910), (5135, 5528)]