20938628

素因数分解:

$2^2\times {\mathrm{17}}^2\times {\mathrm{59}}^1\times {\mathrm{307}}^1$

素因数の和:404

約数の個数: 36

約数和(自身を含む): 39713520

約数和(自身を除く): 18774892

約数列:

[1, 2, 4, 17, 34, 59, 68, 118, 236, 289, 307, 578, 614, 1003, 1156, 1228, 2006, 4012, 5219, 10438, 17051, 18113, 20876, 34102, 36226, 68204, 72452, 88723, 177446, 307921, 354892, 615842, 1231684, 5234657, 10469314, 20938628]

約数ペア:

[(1, 20938628), (2, 10469314), (4, 5234657), (17, 1231684), (34, 615842), (59, 354892), (68, 307921), (118, 177446), (236, 88723), (289, 72452), (307, 68204), (578, 36226), (614, 34102), (1003, 20876), (1156, 18113), (1228, 17051), (2006, 10438), (4012, 5219)]