20281455

素因数分解:

$3^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{7907}}^1$

素因数の和:7940

約数の個数: 32

約数和(自身を含む): 37958400

約数和(自身を除く): 17676945

約数列:

[1, 3, 5, 9, 15, 19, 27, 45, 57, 95, 135, 171, 285, 513, 855, 2565, 7907, 23721, 39535, 71163, 118605, 150233, 213489, 355815, 450699, 751165, 1067445, 1352097, 2253495, 4056291, 6760485, 20281455]

約数ペア:

[(1, 20281455), (3, 6760485), (5, 4056291), (9, 2253495), (15, 1352097), (19, 1067445), (27, 751165), (45, 450699), (57, 355815), (95, 213489), (135, 150233), (171, 118605), (285, 71163), (513, 39535), (855, 23721), (2565, 7907)]