1285820

素因数分解:

$2^2\times 5^1\times {\mathrm{239}}^1\times {\mathrm{269}}^1$

素因数の和:517

約数の個数: 24

約数和(自身を含む): 2721600

約数和(自身を除く): 1435780

約数列:

[1, 2, 4, 5, 10, 20, 239, 269, 478, 538, 956, 1076, 1195, 1345, 2390, 2690, 4780, 5380, 64291, 128582, 257164, 321455, 642910, 1285820]

約数ペア:

[(1, 1285820), (2, 642910), (4, 321455), (5, 257164), (10, 128582), (20, 64291), (239, 5380), (269, 4780), (478, 2690), (538, 2390), (956, 1345), (1076, 1195)]