21242390

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{163403}}^1$

素因数の和:163423

約数の個数: 16

約数和(自身を含む): 41177808

約数和(自身を除く): 19935418

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 163403, 326806, 817015, 1634030, 2124239, 4248478, 10621195, 21242390]

約数ペア:

[(1, 21242390), (2, 10621195), (5, 4248478), (10, 2124239), (13, 1634030), (26, 817015), (65, 326806), (130, 163403)]