21702005

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^2\times {\mathrm{397}}^1$

素因数の和:473

約数の個数: 24

約数和(自身を含む): 29119272

約数和(自身を除く): 7417267

約数列:

[1, 5, 13, 29, 65, 145, 377, 397, 841, 1885, 1985, 4205, 5161, 10933, 11513, 25805, 54665, 57565, 149669, 333877, 748345, 1669385, 4340401, 21702005]

約数ペア:

[(1, 21702005), (5, 4340401), (13, 1669385), (29, 748345), (65, 333877), (145, 149669), (377, 57565), (397, 54665), (841, 25805), (1885, 11513), (1985, 10933), (4205, 5161)]