21545305

素因数分解:

$5^1\times {\mathrm{71}}^1\times {\mathrm{137}}^1\times {\mathrm{443}}^1$

素因数の和:656

約数の個数: 16

約数和(自身を含む): 26469504

約数和(自身を除く): 4924199

約数列:

[1, 5, 71, 137, 355, 443, 685, 2215, 9727, 31453, 48635, 60691, 157265, 303455, 4309061, 21545305]

約数ペア:

[(1, 21545305), (5, 4309061), (71, 303455), (137, 157265), (355, 60691), (443, 48635), (685, 31453), (2215, 9727)]