78201520

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{127}}^1\times {\mathrm{179}}^1$

素因数の和:362

約数の個数: 80

約数和(自身を含む): 188559360

約数和(自身を除く): 110357840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 127, 172, 179, 215, 254, 344, 358, 430, 508, 635, 688, 716, 860, 895, 1016, 1270, 1432, 1720, 1790, 2032, 2540, 2864, 3440, 3580, 5080, 5461, 7160, 7697, 10160, 10922, 14320, 15394, 21844, 22733, 27305, 30788, 38485, 43688, 45466, 54610, 61576, 76970, 87376, 90932, 109220, 113665, 123152, 153940, 181864, 218440, 227330, 307880, 363728, 436880, 454660, 615760, 909320, 977519, 1818640, 1955038, 3910076, 4887595, 7820152, 9775190, 15640304, 19550380, 39100760, 78201520]

約数ペア:

[(1, 78201520), (2, 39100760), (4, 19550380), (5, 15640304), (8, 9775190), (10, 7820152), (16, 4887595), (20, 3910076), (40, 1955038), (43, 1818640), (80, 977519), (86, 909320), (127, 615760), (172, 454660), (179, 436880), (215, 363728), (254, 307880), (344, 227330), (358, 218440), (430, 181864), (508, 153940), (635, 123152), (688, 113665), (716, 109220), (860, 90932), (895, 87376), (1016, 76970), (1270, 61576), (1432, 54610), (1720, 45466), (1790, 43688), (2032, 38485), (2540, 30788), (2864, 27305), (3440, 22733), (3580, 21844), (5080, 15394), (5461, 14320), (7160, 10922), (7697, 10160)]