64640320

素因数分解:

$2^6\times 5^1\times {\mathrm{202001}}^1$

素因数の和:202018

約数の個数: 28

約数和(自身を含む): 153925524

約数和(自身を除く): 89285204

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 202001, 404002, 808004, 1010005, 1616008, 2020010, 3232016, 4040020, 6464032, 8080040, 12928064, 16160080, 32320160, 64640320]

約数ペア:

[(1, 64640320), (2, 32320160), (4, 16160080), (5, 12928064), (8, 8080040), (10, 6464032), (16, 4040020), (20, 3232016), (32, 2020010), (40, 1616008), (64, 1010005), (80, 808004), (160, 404002), (320, 202001)]