19843750

素因数分解:

$2^1\times 5^7\times {\mathrm{127}}^1$

素因数の和:164

約数の個数: 32

約数和(自身を含む): 37499904

約数和(自身を除く): 17656154

約数列:

[1, 2, 5, 10, 25, 50, 125, 127, 250, 254, 625, 635, 1250, 1270, 3125, 3175, 6250, 6350, 15625, 15875, 31250, 31750, 78125, 79375, 156250, 158750, 396875, 793750, 1984375, 3968750, 9921875, 19843750]

約数ペア:

[(1, 19843750), (2, 9921875), (5, 3968750), (10, 1984375), (25, 793750), (50, 396875), (125, 158750), (127, 156250), (250, 79375), (254, 78125), (625, 31750), (635, 31250), (1250, 15875), (1270, 15625), (3125, 6350), (3175, 6250)]