21487700

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{16529}}^1$

素因数の和:16556

約数の個数: 36

約数和(自身を含む): 50218140

約数和(自身を除く): 28730440

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 130, 260, 325, 650, 1300, 16529, 33058, 66116, 82645, 165290, 214877, 330580, 413225, 429754, 826450, 859508, 1074385, 1652900, 2148770, 4297540, 5371925, 10743850, 21487700]

約数ペア:

[(1, 21487700), (2, 10743850), (4, 5371925), (5, 4297540), (10, 2148770), (13, 1652900), (20, 1074385), (25, 859508), (26, 826450), (50, 429754), (52, 413225), (65, 330580), (100, 214877), (130, 165290), (260, 82645), (325, 66116), (650, 33058), (1300, 16529)]