20878520

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{40151}}^1$

素因数の和:40175

約数の個数: 32

約数和(自身を含む): 50591520

約数和(自身を除く): 29713000

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 40151, 80302, 160604, 200755, 321208, 401510, 521963, 803020, 1043926, 1606040, 2087852, 2609815, 4175704, 5219630, 10439260, 20878520]

約数ペア:

[(1, 20878520), (2, 10439260), (4, 5219630), (5, 4175704), (8, 2609815), (10, 2087852), (13, 1606040), (20, 1043926), (26, 803020), (40, 521963), (52, 401510), (65, 321208), (104, 200755), (130, 160604), (260, 80302), (520, 40151)]