21017090

素因数分解:

$2^1\times 5^1\times {\mathrm{101}}^1\times {\mathrm{20809}}^1$

素因数の和:20917

約数の個数: 16

約数和(自身を含む): 38207160

約数和(自身を除く): 17190070

約数列:

[1, 2, 5, 10, 101, 202, 505, 1010, 20809, 41618, 104045, 208090, 2101709, 4203418, 10508545, 21017090]

約数ペア:

[(1, 21017090), (2, 10508545), (5, 4203418), (10, 2101709), (101, 208090), (202, 104045), (505, 41618), (1010, 20809)]