28213875

素因数分解:

$3^2\times 5^3\times {\mathrm{31}}^1\times {\mathrm{809}}^1$

素因数の和:861

約数の個数: 48

約数和(自身を含む): 52565760

約数和(自身を除く): 24351885

約数列:

[1, 3, 5, 9, 15, 25, 31, 45, 75, 93, 125, 155, 225, 279, 375, 465, 775, 809, 1125, 1395, 2325, 2427, 3875, 4045, 6975, 7281, 11625, 12135, 20225, 25079, 34875, 36405, 60675, 75237, 101125, 125395, 182025, 225711, 303375, 376185, 626975, 910125, 1128555, 1880925, 3134875, 5642775, 9404625, 28213875]

約数ペア:

[(1, 28213875), (3, 9404625), (5, 5642775), (9, 3134875), (15, 1880925), (25, 1128555), (31, 910125), (45, 626975), (75, 376185), (93, 303375), (125, 225711), (155, 182025), (225, 125395), (279, 101125), (375, 75237), (465, 60675), (775, 36405), (809, 34875), (1125, 25079), (1395, 20225), (2325, 12135), (2427, 11625), (3875, 7281), (4045, 6975)]