217549340

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{639851}}^1$

素因数の和:639877

約数の個数: 24

約数和(自身を含む): 483728112

約数和(自身を除く): 266178772

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 639851, 1279702, 2559404, 3199255, 6398510, 10877467, 12797020, 21754934, 43509868, 54387335, 108774670, 217549340]

約数ペア:

[(1, 217549340), (2, 108774670), (4, 54387335), (5, 43509868), (10, 21754934), (17, 12797020), (20, 10877467), (34, 6398510), (68, 3199255), (85, 2559404), (170, 1279702), (340, 639851)]