20985640

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{40357}}^1$

素因数の和:40381

約数の個数: 32

約数和(自身を含む): 50851080

約数和(自身を除く): 29865440

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 40357, 80714, 161428, 201785, 322856, 403570, 524641, 807140, 1049282, 1614280, 2098564, 2623205, 4197128, 5246410, 10492820, 20985640]

約数ペア:

[(1, 20985640), (2, 10492820), (4, 5246410), (5, 4197128), (8, 2623205), (10, 2098564), (13, 1614280), (20, 1049282), (26, 807140), (40, 524641), (52, 403570), (65, 322856), (104, 201785), (130, 161428), (260, 80714), (520, 40357)]