21727810

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{397}}^1\times {\mathrm{421}}^1$

素因数の和:838

約数の個数: 32

約数和(自身を含む): 42324912

約数和(自身を除く): 20597102

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 397, 421, 794, 842, 1985, 2105, 3970, 4210, 5161, 5473, 10322, 10946, 25805, 27365, 51610, 54730, 167137, 334274, 835685, 1671370, 2172781, 4345562, 10863905, 21727810]

約数ペア:

[(1, 21727810), (2, 10863905), (5, 4345562), (10, 2172781), (13, 1671370), (26, 835685), (65, 334274), (130, 167137), (397, 54730), (421, 51610), (794, 27365), (842, 25805), (1985, 10946), (2105, 10322), (3970, 5473), (4210, 5161)]