20890875

素因数分解:

$3^1\times 5^3\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{113}}^1$

素因数の和:177

約数の個数: 64

約数和(自身を含む): 38413440

約数和(自身を除く): 17522565

約数列:

[1, 3, 5, 15, 17, 25, 29, 51, 75, 85, 87, 113, 125, 145, 255, 339, 375, 425, 435, 493, 565, 725, 1275, 1479, 1695, 1921, 2125, 2175, 2465, 2825, 3277, 3625, 5763, 6375, 7395, 8475, 9605, 9831, 10875, 12325, 14125, 16385, 28815, 36975, 42375, 48025, 49155, 55709, 61625, 81925, 144075, 167127, 184875, 240125, 245775, 278545, 409625, 720375, 835635, 1228875, 1392725, 4178175, 6963625, 20890875]

約数ペア:

[(1, 20890875), (3, 6963625), (5, 4178175), (15, 1392725), (17, 1228875), (25, 835635), (29, 720375), (51, 409625), (75, 278545), (85, 245775), (87, 240125), (113, 184875), (125, 167127), (145, 144075), (255, 81925), (339, 61625), (375, 55709), (425, 49155), (435, 48025), (493, 42375), (565, 36975), (725, 28815), (1275, 16385), (1479, 14125), (1695, 12325), (1921, 10875), (2125, 9831), (2175, 9605), (2465, 8475), (2825, 7395), (3277, 6375), (3625, 5763)]