9991900

素因数分解:

$2^2\times 5^2\times {\mathrm{163}}^1\times {\mathrm{613}}^1$

素因数の和:790

約数の個数: 36

約数和(自身を含む): 21851032

約数和(自身を除く): 11859132

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 163, 326, 613, 652, 815, 1226, 1630, 2452, 3065, 3260, 4075, 6130, 8150, 12260, 15325, 16300, 30650, 61300, 99919, 199838, 399676, 499595, 999190, 1998380, 2497975, 4995950, 9991900]

約数ペア:

[(1, 9991900), (2, 4995950), (4, 2497975), (5, 1998380), (10, 999190), (20, 499595), (25, 399676), (50, 199838), (100, 99919), (163, 61300), (326, 30650), (613, 16300), (652, 15325), (815, 12260), (1226, 8150), (1630, 6130), (2452, 4075), (3065, 3260)]