21945020

素因数分解:

$2^2\times 5^1\times {\mathrm{269}}^1\times {\mathrm{4079}}^1$

素因数の和:4357

約数の個数: 24

約数和(自身を含む): 46267200

約数和(自身を除く): 24322180

約数列:

[1, 2, 4, 5, 10, 20, 269, 538, 1076, 1345, 2690, 4079, 5380, 8158, 16316, 20395, 40790, 81580, 1097251, 2194502, 4389004, 5486255, 10972510, 21945020]

約数ペア:

[(1, 21945020), (2, 10972510), (4, 5486255), (5, 4389004), (10, 2194502), (20, 1097251), (269, 81580), (538, 40790), (1076, 20395), (1345, 16316), (2690, 8158), (4079, 5380)]