20187279

素因数分解:

$3^3\times 7^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{103}}^1$

素因数の和:197

約数の個数: 64

約数和(自身を含む): 37140480

約数和(自身を除く): 16953201

約数列:

[1, 3, 7, 9, 17, 21, 27, 51, 61, 63, 103, 119, 153, 183, 189, 309, 357, 427, 459, 549, 721, 927, 1037, 1071, 1281, 1647, 1751, 2163, 2781, 3111, 3213, 3843, 5253, 6283, 6489, 7259, 9333, 11529, 12257, 15759, 18849, 19467, 21777, 27999, 36771, 43981, 47277, 56547, 65331, 106811, 110313, 131943, 169641, 195993, 320433, 330939, 395829, 747677, 961299, 1187487, 2243031, 2883897, 6729093, 20187279]

約数ペア:

[(1, 20187279), (3, 6729093), (7, 2883897), (9, 2243031), (17, 1187487), (21, 961299), (27, 747677), (51, 395829), (61, 330939), (63, 320433), (103, 195993), (119, 169641), (153, 131943), (183, 110313), (189, 106811), (309, 65331), (357, 56547), (427, 47277), (459, 43981), (549, 36771), (721, 27999), (927, 21777), (1037, 19467), (1071, 18849), (1281, 15759), (1647, 12257), (1751, 11529), (2163, 9333), (2781, 7259), (3111, 6489), (3213, 6283), (3843, 5253)]