21901790

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{53419}}^1$

素因数の和:53467

約数の個数: 16

約数和(自身を含む): 40385520

約数和(自身を除く): 18483730

約数列:

[1, 2, 5, 10, 41, 82, 205, 410, 53419, 106838, 267095, 534190, 2190179, 4380358, 10950895, 21901790]

約数ペア:

[(1, 21901790), (2, 10950895), (5, 4380358), (10, 2190179), (41, 534190), (82, 267095), (205, 106838), (410, 53419)]