21811220

素因数分解:

$2^2\times 5^1\times {\mathrm{281}}^1\times {\mathrm{3881}}^1$

素因数の和:4171

約数の個数: 24

約数和(自身を含む): 45978408

約数和(自身を除く): 24167188

約数列:

[1, 2, 4, 5, 10, 20, 281, 562, 1124, 1405, 2810, 3881, 5620, 7762, 15524, 19405, 38810, 77620, 1090561, 2181122, 4362244, 5452805, 10905610, 21811220]

約数ペア:

[(1, 21811220), (2, 10905610), (4, 5452805), (5, 4362244), (10, 2181122), (20, 1090561), (281, 77620), (562, 38810), (1124, 19405), (1405, 15524), (2810, 7762), (3881, 5620)]