21018530

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{12437}}^1$

素因数の和:12470

約数の個数: 24

約数和(自身を含む): 40970772

約数和(自身を除く): 19952242

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845, 1690, 12437, 24874, 62185, 124370, 161681, 323362, 808405, 1616810, 2101853, 4203706, 10509265, 21018530]

約数ペア:

[(1, 21018530), (2, 10509265), (5, 4203706), (10, 2101853), (13, 1616810), (26, 808405), (65, 323362), (130, 161681), (169, 124370), (338, 62185), (845, 24874), (1690, 12437)]