1989220

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{1259}}^1$

素因数の和:1347

約数の個数: 24

約数和(自身を含む): 4233600

約数和(自身を除く): 2244380

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1259, 1580, 2518, 5036, 6295, 12590, 25180, 99461, 198922, 397844, 497305, 994610, 1989220]

約数ペア:

[(1, 1989220), (2, 994610), (4, 497305), (5, 397844), (10, 198922), (20, 99461), (79, 25180), (158, 12590), (316, 6295), (395, 5036), (790, 2518), (1259, 1580)]