19902818

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{1217}}^1$

素因数の和:1286

約数の個数: 32

約数和(自身を含む): 34990704

約数和(自身を除く): 15087886

約数列:

[1, 2, 13, 17, 26, 34, 37, 74, 221, 442, 481, 629, 962, 1217, 1258, 2434, 8177, 15821, 16354, 20689, 31642, 41378, 45029, 90058, 268957, 537914, 585377, 765493, 1170754, 1530986, 9951409, 19902818]

約数ペア:

[(1, 19902818), (2, 9951409), (13, 1530986), (17, 1170754), (26, 765493), (34, 585377), (37, 537914), (74, 268957), (221, 90058), (442, 45029), (481, 41378), (629, 31642), (962, 20689), (1217, 16354), (1258, 15821), (2434, 8177)]