19550380

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{127}}^1\times {\mathrm{179}}^1$

素因数の和:358

約数の個数: 48

約数和(自身を含む): 42577920

約数和(自身を除く): 23027540

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 127, 172, 179, 215, 254, 358, 430, 508, 635, 716, 860, 895, 1270, 1790, 2540, 3580, 5461, 7697, 10922, 15394, 21844, 22733, 27305, 30788, 38485, 45466, 54610, 76970, 90932, 109220, 113665, 153940, 227330, 454660, 977519, 1955038, 3910076, 4887595, 9775190, 19550380]

約数ペア:

[(1, 19550380), (2, 9775190), (4, 4887595), (5, 3910076), (10, 1955038), (20, 977519), (43, 454660), (86, 227330), (127, 153940), (172, 113665), (179, 109220), (215, 90932), (254, 76970), (358, 54610), (430, 45466), (508, 38485), (635, 30788), (716, 27305), (860, 22733), (895, 21844), (1270, 15394), (1790, 10922), (2540, 7697), (3580, 5461)]