21103030

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{12487}}^1$

素因数の和:12520

約数の個数: 24

約数和(自身を含む): 41135472

約数和(自身を除く): 20032442

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845, 1690, 12487, 24974, 62435, 124870, 162331, 324662, 811655, 1623310, 2110303, 4220606, 10551515, 21103030]

約数ペア:

[(1, 21103030), (2, 10551515), (5, 4220606), (10, 2110303), (13, 1623310), (26, 811655), (65, 324662), (130, 162331), (169, 124870), (338, 62435), (845, 24974), (1690, 12487)]