18913125

素因数分解:

$3^1\times 5^4\times 7^1\times {\mathrm{11}}^1\times {\mathrm{131}}^1$

素因数の和:172

約数の個数: 80

約数和(自身を含む): 39587328

約数和(自身を除く): 20674203

約数列:

[1, 3, 5, 7, 11, 15, 21, 25, 33, 35, 55, 75, 77, 105, 125, 131, 165, 175, 231, 275, 375, 385, 393, 525, 625, 655, 825, 875, 917, 1155, 1375, 1441, 1875, 1925, 1965, 2625, 2751, 3275, 4125, 4323, 4375, 4585, 5775, 6875, 7205, 9625, 9825, 10087, 13125, 13755, 16375, 20625, 21615, 22925, 28875, 30261, 36025, 48125, 49125, 50435, 68775, 81875, 108075, 114625, 144375, 151305, 180125, 245625, 252175, 343875, 540375, 573125, 756525, 900625, 1260875, 1719375, 2701875, 3782625, 6304375, 18913125]

約数ペア:

[(1, 18913125), (3, 6304375), (5, 3782625), (7, 2701875), (11, 1719375), (15, 1260875), (21, 900625), (25, 756525), (33, 573125), (35, 540375), (55, 343875), (75, 252175), (77, 245625), (105, 180125), (125, 151305), (131, 144375), (165, 114625), (175, 108075), (231, 81875), (275, 68775), (375, 50435), (385, 49125), (393, 48125), (525, 36025), (625, 30261), (655, 28875), (825, 22925), (875, 21615), (917, 20625), (1155, 16375), (1375, 13755), (1441, 13125), (1875, 10087), (1925, 9825), (1965, 9625), (2625, 7205), (2751, 6875), (3275, 5775), (4125, 4585), (4323, 4375)]