21705470

素因数分解:

$2^1\times 5^1\times {\mathrm{809}}^1\times {\mathrm{2683}}^1$

素因数の和:3499

約数の個数: 16

約数和(自身を含む): 39132720

約数和(自身を除く): 17427250

約数列:

[1, 2, 5, 10, 809, 1618, 2683, 4045, 5366, 8090, 13415, 26830, 2170547, 4341094, 10852735, 21705470]

約数ペア:

[(1, 21705470), (2, 10852735), (5, 4341094), (10, 2170547), (809, 26830), (1618, 13415), (2683, 8090), (4045, 5366)]