28209375

素因数分解:

$3^2\times 5^5\times {\mathrm{17}}^1\times {\mathrm{59}}^1$

素因数の和:107

約数の個数: 72

約数和(自身を含む): 54840240

約数和(自身を除く): 26630865

約数列:

[1, 3, 5, 9, 15, 17, 25, 45, 51, 59, 75, 85, 125, 153, 177, 225, 255, 295, 375, 425, 531, 625, 765, 885, 1003, 1125, 1275, 1475, 1875, 2125, 2655, 3009, 3125, 3825, 4425, 5015, 5625, 6375, 7375, 9027, 9375, 10625, 13275, 15045, 19125, 22125, 25075, 28125, 31875, 36875, 45135, 53125, 66375, 75225, 95625, 110625, 125375, 159375, 184375, 225675, 331875, 376125, 478125, 553125, 626875, 1128375, 1659375, 1880625, 3134375, 5641875, 9403125, 28209375]

約数ペア:

[(1, 28209375), (3, 9403125), (5, 5641875), (9, 3134375), (15, 1880625), (17, 1659375), (25, 1128375), (45, 626875), (51, 553125), (59, 478125), (75, 376125), (85, 331875), (125, 225675), (153, 184375), (177, 159375), (225, 125375), (255, 110625), (295, 95625), (375, 75225), (425, 66375), (531, 53125), (625, 45135), (765, 36875), (885, 31875), (1003, 28125), (1125, 25075), (1275, 22125), (1475, 19125), (1875, 15045), (2125, 13275), (2655, 10625), (3009, 9375), (3125, 9027), (3825, 7375), (4425, 6375), (5015, 5625)]