21402910

素因数分解:

$2^1\times 5^1\times {\mathrm{101}}^1\times {\mathrm{21191}}^1$

素因数の和:21299

約数の個数: 16

約数和(自身を含む): 38908512

約数和(自身を除く): 17505602

約数列:

[1, 2, 5, 10, 101, 202, 505, 1010, 21191, 42382, 105955, 211910, 2140291, 4280582, 10701455, 21402910]

約数ペア:

[(1, 21402910), (2, 10701455), (5, 4280582), (10, 2140291), (101, 211910), (202, 105955), (505, 42382), (1010, 21191)]