81212720

素因数分解:

$2^4\times 5^1\times {\mathrm{1015159}}^1$

素因数の和:1015172

約数の個数: 20

約数和(自身を含む): 188819760

約数和(自身を除く): 107607040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1015159, 2030318, 4060636, 5075795, 8121272, 10151590, 16242544, 20303180, 40606360, 81212720]

約数ペア:

[(1, 81212720), (2, 40606360), (4, 20303180), (5, 16242544), (8, 10151590), (10, 8121272), (16, 5075795), (20, 4060636), (40, 2030318), (80, 1015159)]