20408857

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{89}}^1$

素因数の和:201

約数の個数: 32

約数和(自身を含む): 26127360

約数和(自身を除く): 5718503

約数列:

[1, 7, 17, 41, 47, 89, 119, 287, 329, 623, 697, 799, 1513, 1927, 3649, 4183, 4879, 5593, 10591, 13489, 25543, 29281, 32759, 62033, 71111, 171503, 229313, 434231, 497777, 1200521, 2915551, 20408857]

約数ペア:

[(1, 20408857), (7, 2915551), (17, 1200521), (41, 497777), (47, 434231), (89, 229313), (119, 171503), (287, 71111), (329, 62033), (623, 32759), (697, 29281), (799, 25543), (1513, 13489), (1927, 10591), (3649, 5593), (4183, 4879)]