12400720

素因数分解:

$2^4\times 5^1\times {\mathrm{155009}}^1$

素因数の和:155022

約数の個数: 20

約数和(自身を含む): 28831860

約数和(自身を除く): 16431140

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 155009, 310018, 620036, 775045, 1240072, 1550090, 2480144, 3100180, 6200360, 12400720]

約数ペア:

[(1, 12400720), (2, 6200360), (4, 3100180), (5, 2480144), (8, 1550090), (10, 1240072), (16, 775045), (20, 620036), (40, 310018), (80, 155009)]