21287948

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{15607}}^1$

素因数の和:15653

約数の個数: 24

約数和(自身を含む): 41954304

約数和(自身を除く): 20666356

約数列:

[1, 2, 4, 11, 22, 31, 44, 62, 124, 341, 682, 1364, 15607, 31214, 62428, 171677, 343354, 483817, 686708, 967634, 1935268, 5321987, 10643974, 21287948]

約数ペア:

[(1, 21287948), (2, 10643974), (4, 5321987), (11, 1935268), (22, 967634), (31, 686708), (44, 483817), (62, 343354), (124, 171677), (341, 62428), (682, 31214), (1364, 15607)]