21809008

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{104851}}^1$

素因数の和:104872

約数の個数: 20

約数和(自身を含む): 45505768

約数和(自身を除く): 23696760

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 104851, 209702, 419404, 838808, 1363063, 1677616, 2726126, 5452252, 10904504, 21809008]

約数ペア:

[(1, 21809008), (2, 10904504), (4, 5452252), (8, 2726126), (13, 1677616), (16, 1363063), (26, 838808), (52, 419404), (104, 209702), (208, 104851)]