28123875

素因数分解:

$3^3\times 5^3\times {\mathrm{13}}^1\times {\mathrm{641}}^1$

素因数の和:678

約数の個数: 64

約数和(自身を含む): 56085120

約数和(自身を除く): 27961245

約数列:

[1, 3, 5, 9, 13, 15, 25, 27, 39, 45, 65, 75, 117, 125, 135, 195, 225, 325, 351, 375, 585, 641, 675, 975, 1125, 1625, 1755, 1923, 2925, 3205, 3375, 4875, 5769, 8333, 8775, 9615, 14625, 16025, 17307, 24999, 28845, 41665, 43875, 48075, 74997, 80125, 86535, 124995, 144225, 208325, 224991, 240375, 374985, 432675, 624975, 721125, 1041625, 1124955, 1874925, 2163375, 3124875, 5624775, 9374625, 28123875]

約数ペア:

[(1, 28123875), (3, 9374625), (5, 5624775), (9, 3124875), (13, 2163375), (15, 1874925), (25, 1124955), (27, 1041625), (39, 721125), (45, 624975), (65, 432675), (75, 374985), (117, 240375), (125, 224991), (135, 208325), (195, 144225), (225, 124995), (325, 86535), (351, 80125), (375, 74997), (585, 48075), (641, 43875), (675, 41665), (975, 28845), (1125, 24999), (1625, 17307), (1755, 16025), (1923, 14625), (2925, 9615), (3205, 8775), (3375, 8333), (4875, 5769)]