21315915

素因数分解:

$3^2\times 5^1\times {\mathrm{151}}^1\times {\mathrm{3137}}^1$

素因数の和:3299

約数の個数: 24

約数和(自身を含む): 37204128

約数和(自身を除く): 15888213

約数列:

[1, 3, 5, 9, 15, 45, 151, 453, 755, 1359, 2265, 3137, 6795, 9411, 15685, 28233, 47055, 141165, 473687, 1421061, 2368435, 4263183, 7105305, 21315915]

約数ペア:

[(1, 21315915), (3, 7105305), (5, 4263183), (9, 2368435), (15, 1421061), (45, 473687), (151, 141165), (453, 47055), (755, 28233), (1359, 15685), (2265, 9411), (3137, 6795)]