21185515

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{11239}}^1$

素因数の和:11286

約数の個数: 16

約数和(自身を含む): 28324800

約数和(自身を除く): 7139285

約数列:

[1, 5, 13, 29, 65, 145, 377, 1885, 11239, 56195, 146107, 325931, 730535, 1629655, 4237103, 21185515]

約数ペア:

[(1, 21185515), (5, 4237103), (13, 1629655), (29, 730535), (65, 325931), (145, 146107), (377, 56195), (1885, 11239)]