21872140

素因数分解:

$2^2\times 5^1\times {\mathrm{251}}^1\times {\mathrm{4357}}^1$

素因数の和:4617

約数の個数: 24

約数和(自身を含む): 46125072

約数和(自身を除く): 24252932

約数列:

[1, 2, 4, 5, 10, 20, 251, 502, 1004, 1255, 2510, 4357, 5020, 8714, 17428, 21785, 43570, 87140, 1093607, 2187214, 4374428, 5468035, 10936070, 21872140]

約数ペア:

[(1, 21872140), (2, 10936070), (4, 5468035), (5, 4374428), (10, 2187214), (20, 1093607), (251, 87140), (502, 43570), (1004, 21785), (1255, 17428), (2510, 8714), (4357, 5020)]