21125307

素因数分解:

$3^1\times 7^1\times {\mathrm{89}}^2\times {\mathrm{127}}^1$

素因数の和:315

約数の個数: 24

約数和(自身を含む): 32813056

約数和(自身を除く): 11687749

約数列:

[1, 3, 7, 21, 89, 127, 267, 381, 623, 889, 1869, 2667, 7921, 11303, 23763, 33909, 55447, 79121, 166341, 237363, 1005967, 3017901, 7041769, 21125307]

約数ペア:

[(1, 21125307), (3, 7041769), (7, 3017901), (21, 1005967), (89, 237363), (127, 166341), (267, 79121), (381, 55447), (623, 33909), (889, 23763), (1869, 11303), (2667, 7921)]