21357495

素因数分解:

$3^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{3023}}^1$

素因数の和:3191

約数の個数: 24

約数和(自身を含む): 37267776

約数和(自身を除く): 15910281

約数列:

[1, 3, 5, 9, 15, 45, 157, 471, 785, 1413, 2355, 3023, 7065, 9069, 15115, 27207, 45345, 136035, 474611, 1423833, 2373055, 4271499, 7119165, 21357495]

約数ペア:

[(1, 21357495), (3, 7119165), (5, 4271499), (9, 2373055), (15, 1423833), (45, 474611), (157, 136035), (471, 45345), (785, 27207), (1413, 15115), (2355, 9069), (3023, 7065)]