20989750

素因数分解:

$2^1\times 5^3\times {\mathrm{113}}^1\times {\mathrm{743}}^1$

素因数の和:873

約数の個数: 32

約数和(自身を含む): 39693888

約数和(自身を除く): 18704138

約数列:

[1, 2, 5, 10, 25, 50, 113, 125, 226, 250, 565, 743, 1130, 1486, 2825, 3715, 5650, 7430, 14125, 18575, 28250, 37150, 83959, 92875, 167918, 185750, 419795, 839590, 2098975, 4197950, 10494875, 20989750]

約数ペア:

[(1, 20989750), (2, 10494875), (5, 4197950), (10, 2098975), (25, 839590), (50, 419795), (113, 185750), (125, 167918), (226, 92875), (250, 83959), (565, 37150), (743, 28250), (1130, 18575), (1486, 14125), (2825, 7430), (3715, 5650)]