21665260

素因数分解:

$2^2\times 5^1\times {\mathrm{269}}^1\times {\mathrm{4027}}^1$

素因数の和:4305

約数の個数: 24

約数和(自身を含む): 45677520

約数和(自身を除く): 24012260

約数列:

[1, 2, 4, 5, 10, 20, 269, 538, 1076, 1345, 2690, 4027, 5380, 8054, 16108, 20135, 40270, 80540, 1083263, 2166526, 4333052, 5416315, 10832630, 21665260]

約数ペア:

[(1, 21665260), (2, 10832630), (4, 5416315), (5, 4333052), (10, 2166526), (20, 1083263), (269, 80540), (538, 40270), (1076, 20135), (1345, 16108), (2690, 8054), (4027, 5380)]