20980140

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{23}}^2\times {\mathrm{661}}^1$

素因数の和:719

約数の個数: 72

約数和(自身を含む): 61502448

約数和(自身を除く): 40522308

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 23, 30, 46, 60, 69, 92, 115, 138, 230, 276, 345, 460, 529, 661, 690, 1058, 1322, 1380, 1587, 1983, 2116, 2644, 2645, 3174, 3305, 3966, 5290, 6348, 6610, 7932, 7935, 9915, 10580, 13220, 15203, 15870, 19830, 30406, 31740, 39660, 45609, 60812, 76015, 91218, 152030, 182436, 228045, 304060, 349669, 456090, 699338, 912180, 1049007, 1398676, 1748345, 2098014, 3496690, 4196028, 5245035, 6993380, 10490070, 20980140]

約数ペア:

[(1, 20980140), (2, 10490070), (3, 6993380), (4, 5245035), (5, 4196028), (6, 3496690), (10, 2098014), (12, 1748345), (15, 1398676), (20, 1049007), (23, 912180), (30, 699338), (46, 456090), (60, 349669), (69, 304060), (92, 228045), (115, 182436), (138, 152030), (230, 91218), (276, 76015), (345, 60812), (460, 45609), (529, 39660), (661, 31740), (690, 30406), (1058, 19830), (1322, 15870), (1380, 15203), (1587, 13220), (1983, 10580), (2116, 9915), (2644, 7935), (2645, 7932), (3174, 6610), (3305, 6348), (3966, 5290)]