20288625

素因数分解:

$3^1\times 5^3\times 7^1\times {\mathrm{59}}^1\times {\mathrm{131}}^1$

素因数の和:215

約数の個数: 64

約数和(自身を含む): 39536640

約数和(自身を除く): 19248015

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 59, 75, 105, 125, 131, 175, 177, 295, 375, 393, 413, 525, 655, 875, 885, 917, 1239, 1475, 1965, 2065, 2625, 2751, 3275, 4425, 4585, 6195, 7375, 7729, 9825, 10325, 13755, 16375, 22125, 22925, 23187, 30975, 38645, 49125, 51625, 54103, 68775, 114625, 115935, 154875, 162309, 193225, 270515, 343875, 579675, 811545, 966125, 1352575, 2898375, 4057725, 6762875, 20288625]

約数ペア:

[(1, 20288625), (3, 6762875), (5, 4057725), (7, 2898375), (15, 1352575), (21, 966125), (25, 811545), (35, 579675), (59, 343875), (75, 270515), (105, 193225), (125, 162309), (131, 154875), (175, 115935), (177, 114625), (295, 68775), (375, 54103), (393, 51625), (413, 49125), (525, 38645), (655, 30975), (875, 23187), (885, 22925), (917, 22125), (1239, 16375), (1475, 13755), (1965, 10325), (2065, 9825), (2625, 7729), (2751, 7375), (3275, 6195), (4425, 4585)]