21784870

素因数分解:

$2^1\times 5^1\times {\mathrm{223}}^1\times {\mathrm{9769}}^1$

素因数の和:9999

約数の個数: 16

約数和(自身を含む): 39392640

約数和(自身を除く): 17607770

約数列:

[1, 2, 5, 10, 223, 446, 1115, 2230, 9769, 19538, 48845, 97690, 2178487, 4356974, 10892435, 21784870]

約数ペア:

[(1, 21784870), (2, 10892435), (5, 4356974), (10, 2178487), (223, 97690), (446, 48845), (1115, 19538), (2230, 9769)]