21335805

素因数分解:

$3^4\times 5^1\times {\mathrm{139}}^1\times {\mathrm{379}}^1$

素因数の和:535

約数の個数: 40

約数和(自身を含む): 38623200

約数和(自身を除く): 17287395

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 139, 379, 405, 417, 695, 1137, 1251, 1895, 2085, 3411, 3753, 5685, 6255, 10233, 11259, 17055, 18765, 30699, 51165, 52681, 56295, 153495, 158043, 263405, 474129, 790215, 1422387, 2370645, 4267161, 7111935, 21335805]

約数ペア:

[(1, 21335805), (3, 7111935), (5, 4267161), (9, 2370645), (15, 1422387), (27, 790215), (45, 474129), (81, 263405), (135, 158043), (139, 153495), (379, 56295), (405, 52681), (417, 51165), (695, 30699), (1137, 18765), (1251, 17055), (1895, 11259), (2085, 10233), (3411, 6255), (3753, 5685)]