21268105

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{4721}}^1$

素因数の和:4796

約数の個数: 16

約数和(自身を含む): 27538704

約数和(自身を除く): 6270599

約数列:

[1, 5, 17, 53, 85, 265, 901, 4505, 4721, 23605, 80257, 250213, 401285, 1251065, 4253621, 21268105]

約数ペア:

[(1, 21268105), (5, 4253621), (17, 1251065), (53, 401285), (85, 250213), (265, 80257), (901, 23605), (4505, 4721)]