20978884

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{5821}}^1$

素因数の和:5895

約数の個数: 24

約数和(自身を含む): 39612888

約数和(自身を除く): 18634004

約数列:

[1, 2, 4, 17, 34, 53, 68, 106, 212, 901, 1802, 3604, 5821, 11642, 23284, 98957, 197914, 308513, 395828, 617026, 1234052, 5244721, 10489442, 20978884]

約数ペア:

[(1, 20978884), (2, 10489442), (4, 5244721), (17, 1234052), (34, 617026), (53, 395828), (68, 308513), (106, 197914), (212, 98957), (901, 23284), (1802, 11642), (3604, 5821)]