18663281

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{241}}^1$

素因数の和:321

約数の個数: 32

約数和(自身を含む): 24718848

約数和(自身を除く): 6055567

約数列:

[1, 7, 13, 23, 37, 91, 161, 241, 259, 299, 481, 851, 1687, 2093, 3133, 3367, 5543, 5957, 8917, 11063, 21931, 38801, 62419, 72059, 77441, 115921, 205091, 504413, 811447, 1435637, 2666183, 18663281]

約数ペア:

[(1, 18663281), (7, 2666183), (13, 1435637), (23, 811447), (37, 504413), (91, 205091), (161, 115921), (241, 77441), (259, 72059), (299, 62419), (481, 38801), (851, 21931), (1687, 11063), (2093, 8917), (3133, 5957), (3367, 5543)]