19978875

素因数分解:

$3^2\times 5^3\times 7^1\times {\mathrm{43}}^1\times {\mathrm{59}}^1$

素因数の和:130

約数の個数: 96

約数和(自身を含む): 42831360

約数和(自身を除く): 22852485

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 35, 43, 45, 59, 63, 75, 105, 125, 129, 175, 177, 215, 225, 295, 301, 315, 375, 387, 413, 525, 531, 645, 875, 885, 903, 1075, 1125, 1239, 1475, 1505, 1575, 1935, 2065, 2537, 2625, 2655, 2709, 3225, 3717, 4425, 4515, 5375, 6195, 7375, 7525, 7611, 7875, 9675, 10325, 12685, 13275, 13545, 16125, 17759, 18585, 22125, 22575, 22833, 30975, 37625, 38055, 48375, 51625, 53277, 63425, 66375, 67725, 88795, 92925, 112875, 114165, 154875, 159831, 190275, 266385, 317125, 338625, 443975, 464625, 570825, 799155, 951375, 1331925, 2219875, 2854125, 3995775, 6659625, 19978875]

約数ペア:

[(1, 19978875), (3, 6659625), (5, 3995775), (7, 2854125), (9, 2219875), (15, 1331925), (21, 951375), (25, 799155), (35, 570825), (43, 464625), (45, 443975), (59, 338625), (63, 317125), (75, 266385), (105, 190275), (125, 159831), (129, 154875), (175, 114165), (177, 112875), (215, 92925), (225, 88795), (295, 67725), (301, 66375), (315, 63425), (375, 53277), (387, 51625), (413, 48375), (525, 38055), (531, 37625), (645, 30975), (875, 22833), (885, 22575), (903, 22125), (1075, 18585), (1125, 17759), (1239, 16125), (1475, 13545), (1505, 13275), (1575, 12685), (1935, 10325), (2065, 9675), (2537, 7875), (2625, 7611), (2655, 7525), (2709, 7375), (3225, 6195), (3717, 5375), (4425, 4515)]