21407477

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{367}}^1\times {\mathrm{641}}^1$

素因数の和:1028

約数の個数: 16

約数和(自身を含む): 26460672

約数和(自身を除く): 5053195

約数列:

[1, 7, 13, 91, 367, 641, 2569, 4487, 4771, 8333, 33397, 58331, 235247, 1646729, 3058211, 21407477]

約数ペア:

[(1, 21407477), (7, 3058211), (13, 1646729), (91, 235247), (367, 58331), (641, 33397), (2569, 8333), (4487, 4771)]