21157953

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{239}}^1\times {\mathrm{1283}}^1$

素因数の和:1548

約数の個数: 16

約数和(自身を含む): 29583360

約数和(自身を除く): 8425407

約数列:

[1, 3, 23, 69, 239, 717, 1283, 3849, 5497, 16491, 29509, 88527, 306637, 919911, 7052651, 21157953]

約数ペア:

[(1, 21157953), (3, 7052651), (23, 919911), (69, 306637), (239, 88527), (717, 29509), (1283, 16491), (3849, 5497)]