12800360

素因数分解:

$2^3\times 5^1\times {\mathrm{320009}}^1$

素因数の和:320020

約数の個数: 16

約数和(自身を含む): 28800900

約数和(自身を除く): 16000540

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 320009, 640018, 1280036, 1600045, 2560072, 3200090, 6400180, 12800360]

約数ペア:

[(1, 12800360), (2, 6400180), (4, 3200090), (5, 2560072), (8, 1600045), (10, 1280036), (20, 640018), (40, 320009)]