20462840

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{11897}}^1$

素因数の和:11951

約数の個数: 32

約数和(自身を含む): 47116080

約数和(自身を除く): 26653240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 11897, 23794, 47588, 59485, 95176, 118970, 237940, 475880, 511571, 1023142, 2046284, 2557855, 4092568, 5115710, 10231420, 20462840]

約数ペア:

[(1, 20462840), (2, 10231420), (4, 5115710), (5, 4092568), (8, 2557855), (10, 2046284), (20, 1023142), (40, 511571), (43, 475880), (86, 237940), (172, 118970), (215, 95176), (344, 59485), (430, 47588), (860, 23794), (1720, 11897)]