21189290

素因数分解:

$2^1\times 5^1\times {\mathrm{149}}^1\times {\mathrm{14221}}^1$

素因数の和:14377

約数の個数: 16

約数和(自身を含む): 38399400

約数和(自身を除く): 17210110

約数列:

[1, 2, 5, 10, 149, 298, 745, 1490, 14221, 28442, 71105, 142210, 2118929, 4237858, 10594645, 21189290]

約数ペア:

[(1, 21189290), (2, 10594645), (5, 4237858), (10, 2118929), (149, 142210), (298, 71105), (745, 28442), (1490, 14221)]