21855220

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{15391}}^1$

素因数の和:15471

約数の個数: 24

約数和(自身を含む): 46545408

約数和(自身を除く): 24690188

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 15391, 30782, 61564, 76955, 153910, 307820, 1092761, 2185522, 4371044, 5463805, 10927610, 21855220]

約数ペア:

[(1, 21855220), (2, 10927610), (4, 5463805), (5, 4371044), (10, 2185522), (20, 1092761), (71, 307820), (142, 153910), (284, 76955), (355, 61564), (710, 30782), (1420, 15391)]