51520720

素因数分解:

$2^4\times 5^1\times {\mathrm{644009}}^1$

素因数の和:644022

約数の個数: 20

約数和(自身を含む): 119785860

約数和(自身を除く): 68265140

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 644009, 1288018, 2576036, 3220045, 5152072, 6440090, 10304144, 12880180, 25760360, 51520720]

約数ペア:

[(1, 51520720), (2, 25760360), (4, 12880180), (5, 10304144), (8, 6440090), (10, 5152072), (16, 3220045), (20, 2576036), (40, 1288018), (80, 644009)]