28907840

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^1\times {\mathrm{6949}}^1$

素因数の和:6979

約数の個数: 56

約数和(自身を含む): 74142600

約数和(自身を除く): 45234760

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 130, 160, 208, 260, 320, 416, 520, 832, 1040, 2080, 4160, 6949, 13898, 27796, 34745, 55592, 69490, 90337, 111184, 138980, 180674, 222368, 277960, 361348, 444736, 451685, 555920, 722696, 903370, 1111840, 1445392, 1806740, 2223680, 2890784, 3613480, 5781568, 7226960, 14453920, 28907840]

約数ペア:

[(1, 28907840), (2, 14453920), (4, 7226960), (5, 5781568), (8, 3613480), (10, 2890784), (13, 2223680), (16, 1806740), (20, 1445392), (26, 1111840), (32, 903370), (40, 722696), (52, 555920), (64, 451685), (65, 444736), (80, 361348), (104, 277960), (130, 222368), (160, 180674), (208, 138980), (260, 111184), (320, 90337), (416, 69490), (520, 55592), (832, 34745), (1040, 27796), (2080, 13898), (4160, 6949)]