20728125

素因数分解:

$3^2\times 5^5\times {\mathrm{11}}^1\times {\mathrm{67}}^1$

素因数の和:109

約数の個数: 72

約数和(自身を含む): 41434848

約数和(自身を除く): 20706723

約数列:

[1, 3, 5, 9, 11, 15, 25, 33, 45, 55, 67, 75, 99, 125, 165, 201, 225, 275, 335, 375, 495, 603, 625, 737, 825, 1005, 1125, 1375, 1675, 1875, 2211, 2475, 3015, 3125, 3685, 4125, 5025, 5625, 6633, 6875, 8375, 9375, 11055, 12375, 15075, 18425, 20625, 25125, 28125, 33165, 34375, 41875, 55275, 61875, 75375, 92125, 103125, 125625, 165825, 209375, 276375, 309375, 376875, 460625, 628125, 829125, 1381875, 1884375, 2303125, 4145625, 6909375, 20728125]

約数ペア:

[(1, 20728125), (3, 6909375), (5, 4145625), (9, 2303125), (11, 1884375), (15, 1381875), (25, 829125), (33, 628125), (45, 460625), (55, 376875), (67, 309375), (75, 276375), (99, 209375), (125, 165825), (165, 125625), (201, 103125), (225, 92125), (275, 75375), (335, 61875), (375, 55275), (495, 41875), (603, 34375), (625, 33165), (737, 28125), (825, 25125), (1005, 20625), (1125, 18425), (1375, 15075), (1675, 12375), (1875, 11055), (2211, 9375), (2475, 8375), (3015, 6875), (3125, 6633), (3685, 5625), (4125, 5025)]