99997880

素因数分解:

$2^3\times 5^1\times {\mathrm{2499947}}^1$

素因数の和:2499958

約数の個数: 16

約数和(自身を含む): 224995320

約数和(自身を除く): 124997440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2499947, 4999894, 9999788, 12499735, 19999576, 24999470, 49998940, 99997880]

約数ペア:

[(1, 99997880), (2, 49998940), (4, 24999470), (5, 19999576), (8, 12499735), (10, 9999788), (20, 4999894), (40, 2499947)]