21401505

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{25031}}^1$

素因数の和:25061

約数の個数: 24

約数和(自身を含む): 39049920

約数和(自身を除く): 17648415

約数列:

[1, 3, 5, 9, 15, 19, 45, 57, 95, 171, 285, 855, 25031, 75093, 125155, 225279, 375465, 475589, 1126395, 1426767, 2377945, 4280301, 7133835, 21401505]

約数ペア:

[(1, 21401505), (3, 7133835), (5, 4280301), (9, 2377945), (15, 1426767), (19, 1126395), (45, 475589), (57, 375465), (95, 225279), (171, 125155), (285, 75093), (855, 25031)]