655120720

素因数分解:

$2^4\times 5^1\times {\mathrm{8189009}}^1$

素因数の和:8189022

約数の個数: 20

約数和(自身を含む): 1523155860

約数和(自身を除く): 868035140

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 8189009, 16378018, 32756036, 40945045, 65512072, 81890090, 131024144, 163780180, 327560360, 655120720]

約数ペア:

[(1, 655120720), (2, 327560360), (4, 163780180), (5, 131024144), (8, 81890090), (10, 65512072), (16, 40945045), (20, 32756036), (40, 16378018), (80, 8189009)]