20705420

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^2\times {\mathrm{1231}}^1$

素因数の和:1298

約数の個数: 36

約数和(自身を含む): 45069024

約数和(自身を除く): 24363604

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 116, 145, 290, 580, 841, 1231, 1682, 2462, 3364, 4205, 4924, 6155, 8410, 12310, 16820, 24620, 35699, 71398, 142796, 178495, 356990, 713980, 1035271, 2070542, 4141084, 5176355, 10352710, 20705420]

約数ペア:

[(1, 20705420), (2, 10352710), (4, 5176355), (5, 4141084), (10, 2070542), (20, 1035271), (29, 713980), (58, 356990), (116, 178495), (145, 142796), (290, 71398), (580, 35699), (841, 24620), (1231, 16820), (1682, 12310), (2462, 8410), (3364, 6155), (4205, 4924)]