18290480

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{409}}^1$

素因数の和:478

約数の個数: 80

約数和(自身を含む): 46976160

約数和(自身を除く): 28685680

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 43, 52, 65, 80, 86, 104, 130, 172, 208, 215, 260, 344, 409, 430, 520, 559, 688, 818, 860, 1040, 1118, 1636, 1720, 2045, 2236, 2795, 3272, 3440, 4090, 4472, 5317, 5590, 6544, 8180, 8944, 10634, 11180, 16360, 17587, 21268, 22360, 26585, 32720, 35174, 42536, 44720, 53170, 70348, 85072, 87935, 106340, 140696, 175870, 212680, 228631, 281392, 351740, 425360, 457262, 703480, 914524, 1143155, 1406960, 1829048, 2286310, 3658096, 4572620, 9145240, 18290480]

約数ペア:

[(1, 18290480), (2, 9145240), (4, 4572620), (5, 3658096), (8, 2286310), (10, 1829048), (13, 1406960), (16, 1143155), (20, 914524), (26, 703480), (40, 457262), (43, 425360), (52, 351740), (65, 281392), (80, 228631), (86, 212680), (104, 175870), (130, 140696), (172, 106340), (208, 87935), (215, 85072), (260, 70348), (344, 53170), (409, 44720), (430, 42536), (520, 35174), (559, 32720), (688, 26585), (818, 22360), (860, 21268), (1040, 17587), (1118, 16360), (1636, 11180), (1720, 10634), (2045, 8944), (2236, 8180), (2795, 6544), (3272, 5590), (3440, 5317), (4090, 4472)]