19872500

素因数分解:

$2^2\times 5^4\times {\mathrm{7949}}^1$

素因数の和:7973

約数の個数: 30

約数和(自身を含む): 43462650

約数和(自身を除く): 23590150

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 250, 500, 625, 1250, 2500, 7949, 15898, 31796, 39745, 79490, 158980, 198725, 397450, 794900, 993625, 1987250, 3974500, 4968125, 9936250, 19872500]

約数ペア:

[(1, 19872500), (2, 9936250), (4, 4968125), (5, 3974500), (10, 1987250), (20, 993625), (25, 794900), (50, 397450), (100, 198725), (125, 158980), (250, 79490), (500, 39745), (625, 31796), (1250, 15898), (2500, 7949)]