28201725

素因数分解:

$3^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{101}}^1$

素因数の和:207

約数の個数: 72

約数和(自身を含む): 54753192

約数和(自身を除く): 26551467

約数列:

[1, 3, 5, 9, 15, 17, 25, 45, 51, 73, 75, 85, 101, 153, 219, 225, 255, 303, 365, 425, 505, 657, 765, 909, 1095, 1241, 1275, 1515, 1717, 1825, 2525, 3285, 3723, 3825, 4545, 5151, 5475, 6205, 7373, 7575, 8585, 11169, 15453, 16425, 18615, 22119, 22725, 25755, 31025, 36865, 42925, 55845, 66357, 77265, 93075, 110595, 125341, 128775, 184325, 279225, 331785, 376023, 386325, 552975, 626705, 1128069, 1658925, 1880115, 3133525, 5640345, 9400575, 28201725]

約数ペア:

[(1, 28201725), (3, 9400575), (5, 5640345), (9, 3133525), (15, 1880115), (17, 1658925), (25, 1128069), (45, 626705), (51, 552975), (73, 386325), (75, 376023), (85, 331785), (101, 279225), (153, 184325), (219, 128775), (225, 125341), (255, 110595), (303, 93075), (365, 77265), (425, 66357), (505, 55845), (657, 42925), (765, 36865), (909, 31025), (1095, 25755), (1241, 22725), (1275, 22119), (1515, 18615), (1717, 16425), (1825, 15453), (2525, 11169), (3285, 8585), (3723, 7575), (3825, 7373), (4545, 6205), (5151, 5475)]