21292340

素因数分解:

$2^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{6781}}^1$

素因数の和:6947

約数の個数: 24

約数和(自身を含む): 45005352

約数和(自身を除く): 23713012

約数列:

[1, 2, 4, 5, 10, 20, 157, 314, 628, 785, 1570, 3140, 6781, 13562, 27124, 33905, 67810, 135620, 1064617, 2129234, 4258468, 5323085, 10646170, 21292340]

約数ペア:

[(1, 21292340), (2, 10646170), (4, 5323085), (5, 4258468), (10, 2129234), (20, 1064617), (157, 135620), (314, 67810), (628, 33905), (785, 27124), (1570, 13562), (3140, 6781)]