21089980

素因数分解:

$2^2\times 5^1\times {\mathrm{563}}^1\times {\mathrm{1873}}^1$

素因数の和:2445

約数の個数: 24

約数和(自身を含む): 44391312

約数和(自身を除く): 23301332

約数列:

[1, 2, 4, 5, 10, 20, 563, 1126, 1873, 2252, 2815, 3746, 5630, 7492, 9365, 11260, 18730, 37460, 1054499, 2108998, 4217996, 5272495, 10544990, 21089980]

約数ペア:

[(1, 21089980), (2, 10544990), (4, 5272495), (5, 4217996), (10, 2108998), (20, 1054499), (563, 37460), (1126, 18730), (1873, 11260), (2252, 9365), (2815, 7492), (3746, 5630)]