212821405

素因数分解:

$5^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{21061}}^1$

素因数の和:21156

約数の個数: 16

約数和(自身を含む): 266897664

約数和(自身を除く): 54076259

約数列:

[1, 5, 43, 47, 215, 235, 2021, 10105, 21061, 105305, 905623, 989867, 4528115, 4949335, 42564281, 212821405]

約数ペア:

[(1, 212821405), (5, 42564281), (43, 4949335), (47, 4528115), (215, 989867), (235, 905623), (2021, 105305), (10105, 21061)]