20511760

素因数分解:

$2^4\times 5^1\times {\mathrm{113}}^1\times {\mathrm{2269}}^1$

素因数の和:2395

約数の個数: 40

約数和(自身を含む): 48133080

約数和(自身を除く): 27621320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 113, 226, 452, 565, 904, 1130, 1808, 2260, 2269, 4520, 4538, 9040, 9076, 11345, 18152, 22690, 36304, 45380, 90760, 181520, 256397, 512794, 1025588, 1281985, 2051176, 2563970, 4102352, 5127940, 10255880, 20511760]

約数ペア:

[(1, 20511760), (2, 10255880), (4, 5127940), (5, 4102352), (8, 2563970), (10, 2051176), (16, 1281985), (20, 1025588), (40, 512794), (80, 256397), (113, 181520), (226, 90760), (452, 45380), (565, 36304), (904, 22690), (1130, 18152), (1808, 11345), (2260, 9076), (2269, 9040), (4520, 4538)]