21810815

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{307}}^1\times {\mathrm{1093}}^1$

素因数の和:1418

約数の個数: 16

約数和(自身を含む): 28303968

約数和(自身を除く): 6493153

約数列:

[1, 5, 13, 65, 307, 1093, 1535, 3991, 5465, 14209, 19955, 71045, 335551, 1677755, 4362163, 21810815]

約数ペア:

[(1, 21810815), (5, 4362163), (13, 1677755), (65, 335551), (307, 71045), (1093, 19955), (1535, 14209), (3991, 5465)]