20415275

素因数分解:

$5^2\times {\mathrm{29}}^2\times {\mathrm{971}}^1$

素因数の和:1039

約数の個数: 18

約数和(自身を含む): 26244972

約数和(自身を除く): 5829697

約数列:

[1, 5, 25, 29, 145, 725, 841, 971, 4205, 4855, 21025, 24275, 28159, 140795, 703975, 816611, 4083055, 20415275]

約数ペア:

[(1, 20415275), (5, 4083055), (25, 816611), (29, 703975), (145, 140795), (725, 28159), (841, 24275), (971, 21025), (4205, 4855)]