20805957640

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{930499}}^1$

素因数の和:930566

約数の個数: 64

約数和(自身を含む): 51586920000

約数和(自身を除く): 30780962360

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 43, 52, 65, 86, 104, 130, 172, 215, 260, 344, 430, 520, 559, 860, 1118, 1720, 2236, 2795, 4472, 5590, 11180, 22360, 930499, 1860998, 3721996, 4652495, 7443992, 9304990, 12096487, 18609980, 24192974, 37219960, 40011457, 48385948, 60482435, 80022914, 96771896, 120964870, 160045828, 200057285, 241929740, 320091656, 400114570, 483859480, 520148941, 800229140, 1040297882, 1600458280, 2080595764, 2600744705, 4161191528, 5201489410, 10402978820, 20805957640]

約数ペア:

[(1, 20805957640), (2, 10402978820), (4, 5201489410), (5, 4161191528), (8, 2600744705), (10, 2080595764), (13, 1600458280), (20, 1040297882), (26, 800229140), (40, 520148941), (43, 483859480), (52, 400114570), (65, 320091656), (86, 241929740), (104, 200057285), (130, 160045828), (172, 120964870), (215, 96771896), (260, 80022914), (344, 60482435), (430, 48385948), (520, 40011457), (559, 37219960), (860, 24192974), (1118, 18609980), (1720, 12096487), (2236, 9304990), (2795, 7443992), (4472, 4652495), (5590, 3721996), (11180, 1860998), (22360, 930499)]