20564625

素因数分解:

$3^1\times 5^3\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1$

素因数の和:139

約数の個数: 64

約数和(自身を含む): 37140480

約数和(自身を除く): 16575855

約数列:

[1, 3, 5, 15, 25, 29, 31, 61, 75, 87, 93, 125, 145, 155, 183, 305, 375, 435, 465, 725, 775, 899, 915, 1525, 1769, 1891, 2175, 2325, 2697, 3625, 3875, 4495, 4575, 5307, 5673, 7625, 8845, 9455, 10875, 11625, 13485, 22475, 22875, 26535, 28365, 44225, 47275, 54839, 67425, 112375, 132675, 141825, 164517, 221125, 236375, 274195, 337125, 663375, 709125, 822585, 1370975, 4112925, 6854875, 20564625]

約数ペア:

[(1, 20564625), (3, 6854875), (5, 4112925), (15, 1370975), (25, 822585), (29, 709125), (31, 663375), (61, 337125), (75, 274195), (87, 236375), (93, 221125), (125, 164517), (145, 141825), (155, 132675), (183, 112375), (305, 67425), (375, 54839), (435, 47275), (465, 44225), (725, 28365), (775, 26535), (899, 22875), (915, 22475), (1525, 13485), (1769, 11625), (1891, 10875), (2175, 9455), (2325, 8845), (2697, 7625), (3625, 5673), (3875, 5307), (4495, 4575)]