28218640

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{20749}}^1$

素因数の和:20779

約数の個数: 40

約数和(自身を含む): 69471000

約数和(自身を除く): 41252360

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 20749, 41498, 82996, 103745, 165992, 207490, 331984, 352733, 414980, 705466, 829960, 1410932, 1659920, 1763665, 2821864, 3527330, 5643728, 7054660, 14109320, 28218640]

約数ペア:

[(1, 28218640), (2, 14109320), (4, 7054660), (5, 5643728), (8, 3527330), (10, 2821864), (16, 1763665), (17, 1659920), (20, 1410932), (34, 829960), (40, 705466), (68, 414980), (80, 352733), (85, 331984), (136, 207490), (170, 165992), (272, 103745), (340, 82996), (680, 41498), (1360, 20749)]