21890828

素因数分解:

$2^2\times {\mathrm{37}}^1\times {\mathrm{211}}^1\times {\mathrm{701}}^1$

素因数の和:953

約数の個数: 24

約数和(自身を含む): 39587184

約数和(自身を除く): 17696356

約数列:

[1, 2, 4, 37, 74, 148, 211, 422, 701, 844, 1402, 2804, 7807, 15614, 25937, 31228, 51874, 103748, 147911, 295822, 591644, 5472707, 10945414, 21890828]

約数ペア:

[(1, 21890828), (2, 10945414), (4, 5472707), (37, 591644), (74, 295822), (148, 147911), (211, 103748), (422, 51874), (701, 31228), (844, 25937), (1402, 15614), (2804, 7807)]