21292720

素因数分解:

$2^4\times 5^1\times {\mathrm{266159}}^1$

素因数の和:266172

約数の個数: 20

約数和(自身を含む): 49505760

約数和(自身を除く): 28213040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 266159, 532318, 1064636, 1330795, 2129272, 2661590, 4258544, 5323180, 10646360, 21292720]

約数ペア:

[(1, 21292720), (2, 10646360), (4, 5323180), (5, 4258544), (8, 2661590), (10, 2129272), (16, 1330795), (20, 1064636), (40, 532318), (80, 266159)]