20926420

素因数分解:

$2^2\times 5^1\times {\mathrm{491}}^1\times {\mathrm{2131}}^1$

素因数の和:2631

約数の個数: 24

約数和(自身を含む): 44055648

約数和(自身を除く): 23129228

約数列:

[1, 2, 4, 5, 10, 20, 491, 982, 1964, 2131, 2455, 4262, 4910, 8524, 9820, 10655, 21310, 42620, 1046321, 2092642, 4185284, 5231605, 10463210, 20926420]

約数ペア:

[(1, 20926420), (2, 10463210), (4, 5231605), (5, 4185284), (10, 2092642), (20, 1046321), (491, 42620), (982, 21310), (1964, 10655), (2131, 9820), (2455, 8524), (4262, 4910)]