21715875

素因数分解:

$3^2\times 5^3\times {\mathrm{97}}^1\times {\mathrm{199}}^1$

素因数の和:317

約数の個数: 48

約数和(自身を含む): 39748800

約数和(自身を除く): 18032925

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 97, 125, 199, 225, 291, 375, 485, 597, 873, 995, 1125, 1455, 1791, 2425, 2985, 4365, 4975, 7275, 8955, 12125, 14925, 19303, 21825, 24875, 36375, 44775, 57909, 74625, 96515, 109125, 173727, 223875, 289545, 482575, 868635, 1447725, 2412875, 4343175, 7238625, 21715875]

約数ペア:

[(1, 21715875), (3, 7238625), (5, 4343175), (9, 2412875), (15, 1447725), (25, 868635), (45, 482575), (75, 289545), (97, 223875), (125, 173727), (199, 109125), (225, 96515), (291, 74625), (375, 57909), (485, 44775), (597, 36375), (873, 24875), (995, 21825), (1125, 19303), (1455, 14925), (1791, 12125), (2425, 8955), (2985, 7275), (4365, 4975)]