19804120

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{70729}}^1$

素因数の和:70747

約数の個数: 32

約数和(自身を含む): 50925600

約数和(自身を除く): 31121480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 70729, 141458, 282916, 353645, 495103, 565832, 707290, 990206, 1414580, 1980412, 2475515, 2829160, 3960824, 4951030, 9902060, 19804120]

約数ペア:

[(1, 19804120), (2, 9902060), (4, 4951030), (5, 3960824), (7, 2829160), (8, 2475515), (10, 1980412), (14, 1414580), (20, 990206), (28, 707290), (35, 565832), (40, 495103), (56, 353645), (70, 282916), (140, 141458), (280, 70729)]