55240720

素因数分解:

$2^4\times 5^1\times {\mathrm{690509}}^1$

素因数の和:690522

約数の個数: 20

約数和(自身を含む): 128434860

約数和(自身を除く): 73194140

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 690509, 1381018, 2762036, 3452545, 5524072, 6905090, 11048144, 13810180, 27620360, 55240720]

約数ペア:

[(1, 55240720), (2, 27620360), (4, 13810180), (5, 11048144), (8, 6905090), (10, 5524072), (16, 3452545), (20, 2762036), (40, 1381018), (80, 690509)]