21390447

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{28867}}^1$

素因数の和:28902

約数の個数: 16

約数和(自身を含む): 32332160

約数和(自身を除く): 10941713

約数列:

[1, 3, 13, 19, 39, 57, 247, 741, 28867, 86601, 375271, 548473, 1125813, 1645419, 7130149, 21390447]

約数ペア:

[(1, 21390447), (3, 7130149), (13, 1645419), (19, 1125813), (39, 548473), (57, 375271), (247, 86601), (741, 28867)]