20003905

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{3701}}^1$

素因数の和:3776

約数の個数: 16

約数和(自身を含む): 25588224

約数和(自身を除く): 5584319

約数列:

[1, 5, 23, 47, 115, 235, 1081, 3701, 5405, 18505, 85123, 173947, 425615, 869735, 4000781, 20003905]

約数ペア:

[(1, 20003905), (5, 4000781), (23, 869735), (47, 425615), (115, 173947), (235, 85123), (1081, 18505), (3701, 5405)]