18813580

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{13249}}^1$

素因数の和:13329

約数の個数: 24

約数和(自身を含む): 40068000

約数和(自身を除く): 21254420

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 13249, 26498, 52996, 66245, 132490, 264980, 940679, 1881358, 3762716, 4703395, 9406790, 18813580]

約数ペア:

[(1, 18813580), (2, 9406790), (4, 4703395), (5, 3762716), (10, 1881358), (20, 940679), (71, 264980), (142, 132490), (284, 66245), (355, 52996), (710, 26498), (1420, 13249)]