19871125

素因数分解:

$5^3\times {\mathrm{71}}^1\times {\mathrm{2239}}^1$

素因数の和:2325

約数の個数: 16

約数和(自身を含む): 25159680

約数和(自身を除く): 5288555

約数列:

[1, 5, 25, 71, 125, 355, 1775, 2239, 8875, 11195, 55975, 158969, 279875, 794845, 3974225, 19871125]

約数ペア:

[(1, 19871125), (5, 3974225), (25, 794845), (71, 279875), (125, 158969), (355, 55975), (1775, 11195), (2239, 8875)]