21358916

素因数分解:

$2^2\times {\mathrm{37}}^1\times {\mathrm{277}}^1\times {\mathrm{521}}^1$

素因数の和:839

約数の個数: 24

約数和(自身を含む): 38600856

約数和(自身を除く): 17241940

約数列:

[1, 2, 4, 37, 74, 148, 277, 521, 554, 1042, 1108, 2084, 10249, 19277, 20498, 38554, 40996, 77108, 144317, 288634, 577268, 5339729, 10679458, 21358916]

約数ペア:

[(1, 21358916), (2, 10679458), (4, 5339729), (37, 577268), (74, 288634), (148, 144317), (277, 77108), (521, 40996), (554, 38554), (1042, 20498), (1108, 19277), (2084, 10249)]