19972100

素因数分解:

$2^2\times 5^2\times {\mathrm{199721}}^1$

素因数の和:199735

約数の個数: 18

約数和(自身を含む): 43339674

約数和(自身を除く): 23367574

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 199721, 399442, 798884, 998605, 1997210, 3994420, 4993025, 9986050, 19972100]

約数ペア:

[(1, 19972100), (2, 9986050), (4, 4993025), (5, 3994420), (10, 1997210), (20, 998605), (25, 798884), (50, 399442), (100, 199721)]