621220

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{349}}^1$

素因数の和:447

約数の個数: 24

約数和(自身を含む): 1323000

約数和(自身を除く): 701780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 349, 356, 445, 698, 890, 1396, 1745, 1780, 3490, 6980, 31061, 62122, 124244, 155305, 310610, 621220]

約数ペア:

[(1, 621220), (2, 310610), (4, 155305), (5, 124244), (10, 62122), (20, 31061), (89, 6980), (178, 3490), (349, 1780), (356, 1745), (445, 1396), (698, 890)]