21682780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{154877}}^1$

素因数の和:154893

約数の個数: 24

約数和(自身を含む): 52039008

約数和(自身を除く): 30356228

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 154877, 309754, 619508, 774385, 1084139, 1548770, 2168278, 3097540, 4336556, 5420695, 10841390, 21682780]

約数ペア:

[(1, 21682780), (2, 10841390), (4, 5420695), (5, 4336556), (7, 3097540), (10, 2168278), (14, 1548770), (20, 1084139), (28, 774385), (35, 619508), (70, 309754), (140, 154877)]