20107175

素因数分解:

$5^2\times {\mathrm{11}}^2\times {\mathrm{17}}^2\times {\mathrm{23}}^1$

素因数の和:89

約数の個数: 54

約数和(自身を含む): 30378264

約数和(自身を除く): 10271089

約数列:

[1, 5, 11, 17, 23, 25, 55, 85, 115, 121, 187, 253, 275, 289, 391, 425, 575, 605, 935, 1265, 1445, 1955, 2057, 2783, 3025, 3179, 4301, 4675, 6325, 6647, 7225, 9775, 10285, 13915, 15895, 21505, 33235, 34969, 47311, 51425, 69575, 73117, 79475, 107525, 166175, 174845, 236555, 365585, 804287, 874225, 1182775, 1827925, 4021435, 20107175]

約数ペア:

[(1, 20107175), (5, 4021435), (11, 1827925), (17, 1182775), (23, 874225), (25, 804287), (55, 365585), (85, 236555), (115, 174845), (121, 166175), (187, 107525), (253, 79475), (275, 73117), (289, 69575), (391, 51425), (425, 47311), (575, 34969), (605, 33235), (935, 21505), (1265, 15895), (1445, 13915), (1955, 10285), (2057, 9775), (2783, 7225), (3025, 6647), (3179, 6325), (4301, 4675)]