21672820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{83357}}^1$

素因数の和:83379

約数の個数: 24

約数和(自身を含む): 49014504

約数和(自身を除く): 27341684

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 83357, 166714, 333428, 416785, 833570, 1083641, 1667140, 2167282, 4334564, 5418205, 10836410, 21672820]

約数ペア:

[(1, 21672820), (2, 10836410), (4, 5418205), (5, 4334564), (10, 2167282), (13, 1667140), (20, 1083641), (26, 833570), (52, 416785), (65, 333428), (130, 166714), (260, 83357)]