20987656

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{154321}}^1$

素因数の和:154344

約数の個数: 16

約数和(自身を含む): 41666940

約数和(自身を除く): 20679284

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 154321, 308642, 617284, 1234568, 2623457, 5246914, 10493828, 20987656]

約数ペア:

[(1, 20987656), (2, 10493828), (4, 5246914), (8, 2623457), (17, 1234568), (34, 617284), (68, 308642), (136, 154321)]