18130520

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{83}}^1\times {\mathrm{127}}^1$

素因数の和:264

約数の個数: 64

約数和(自身を含む): 42577920

約数和(自身を除く): 24447400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 83, 86, 127, 166, 172, 215, 254, 332, 344, 415, 430, 508, 635, 664, 830, 860, 1016, 1270, 1660, 1720, 2540, 3320, 3569, 5080, 5461, 7138, 10541, 10922, 14276, 17845, 21082, 21844, 27305, 28552, 35690, 42164, 43688, 52705, 54610, 71380, 84328, 105410, 109220, 142760, 210820, 218440, 421640, 453263, 906526, 1813052, 2266315, 3626104, 4532630, 9065260, 18130520]

約数ペア:

[(1, 18130520), (2, 9065260), (4, 4532630), (5, 3626104), (8, 2266315), (10, 1813052), (20, 906526), (40, 453263), (43, 421640), (83, 218440), (86, 210820), (127, 142760), (166, 109220), (172, 105410), (215, 84328), (254, 71380), (332, 54610), (344, 52705), (415, 43688), (430, 42164), (508, 35690), (635, 28552), (664, 27305), (830, 21844), (860, 21082), (1016, 17845), (1270, 14276), (1660, 10922), (1720, 10541), (2540, 7138), (3320, 5461), (3569, 5080)]