21640100

素因数分解:

$2^2\times 5^2\times {\mathrm{216401}}^1$

素因数の和:216415

約数の個数: 18

約数和(自身を含む): 46959234

約数和(自身を除く): 25319134

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 216401, 432802, 865604, 1082005, 2164010, 4328020, 5410025, 10820050, 21640100]

約数ペア:

[(1, 21640100), (2, 10820050), (4, 5410025), (5, 4328020), (10, 2164010), (20, 1082005), (25, 865604), (50, 432802), (100, 216401)]