2640280

素因数分解:

$2^3\times 5^1\times {\mathrm{149}}^1\times {\mathrm{443}}^1$

素因数の和:603

約数の個数: 32

約数和(自身を含む): 5994000

約数和(自身を除く): 3353720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 149, 298, 443, 596, 745, 886, 1192, 1490, 1772, 2215, 2980, 3544, 4430, 5960, 8860, 17720, 66007, 132014, 264028, 330035, 528056, 660070, 1320140, 2640280]

約数ペア:

[(1, 2640280), (2, 1320140), (4, 660070), (5, 528056), (8, 330035), (10, 264028), (20, 132014), (40, 66007), (149, 17720), (298, 8860), (443, 5960), (596, 4430), (745, 3544), (886, 2980), (1192, 2215), (1490, 1772)]