20215550

素因数分解:

$2^1\times 5^2\times {\mathrm{17}}^2\times {\mathrm{1399}}^1$

素因数の和:1445

約数の個数: 36

約数和(自身を含む): 39971400

約数和(自身を除く): 19755850

約数列:

[1, 2, 5, 10, 17, 25, 34, 50, 85, 170, 289, 425, 578, 850, 1399, 1445, 2798, 2890, 6995, 7225, 13990, 14450, 23783, 34975, 47566, 69950, 118915, 237830, 404311, 594575, 808622, 1189150, 2021555, 4043110, 10107775, 20215550]

約数ペア:

[(1, 20215550), (2, 10107775), (5, 4043110), (10, 2021555), (17, 1189150), (25, 808622), (34, 594575), (50, 404311), (85, 237830), (170, 118915), (289, 69950), (425, 47566), (578, 34975), (850, 23783), (1399, 14450), (1445, 13990), (2798, 7225), (2890, 6995)]