155120720

素因数分解:

$2^4\times 5^1\times {\mathrm{1939009}}^1$

素因数の和:1939022

約数の個数: 20

約数和(自身を含む): 360655860

約数和(自身を除く): 205535140

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1939009, 3878018, 7756036, 9695045, 15512072, 19390090, 31024144, 38780180, 77560360, 155120720]

約数ペア:

[(1, 155120720), (2, 77560360), (4, 38780180), (5, 31024144), (8, 19390090), (10, 15512072), (16, 9695045), (20, 7756036), (40, 3878018), (80, 1939009)]