9990100

素因数分解:

$2^2\times 5^2\times {\mathrm{99901}}^1$

素因数の和:99915

約数の個数: 18

約数和(自身を含む): 21678734

約数和(自身を除く): 11688634

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 99901, 199802, 399604, 499505, 999010, 1998020, 2497525, 4995050, 9990100]

約数ペア:

[(1, 9990100), (2, 4995050), (4, 2497525), (5, 1998020), (10, 999010), (20, 499505), (25, 399604), (50, 199802), (100, 99901)]