20561937136

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{331}}^1\times {\mathrm{2957}}^1$

素因数の和:3410

約数の個数: 80

約数和(自身を含む): 43473655008

約数和(自身を除く): 22911717872

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 101, 104, 202, 208, 331, 404, 662, 808, 1313, 1324, 1616, 2626, 2648, 2957, 4303, 5252, 5296, 5914, 8606, 10504, 11828, 17212, 21008, 23656, 33431, 34424, 38441, 47312, 66862, 68848, 76882, 133724, 153764, 267448, 298657, 307528, 434603, 534896, 597314, 615056, 869206, 978767, 1194628, 1738412, 1957534, 2389256, 3476824, 3882541, 3915068, 4778512, 6953648, 7765082, 7830136, 12723971, 15530164, 15660272, 25447942, 31060328, 50895884, 62120656, 98855467, 101791768, 197710934, 203583536, 395421868, 790843736, 1285121071, 1581687472, 2570242142, 5140484284, 10280968568, 20561937136]

約数ペア:

[(1, 20561937136), (2, 10280968568), (4, 5140484284), (8, 2570242142), (13, 1581687472), (16, 1285121071), (26, 790843736), (52, 395421868), (101, 203583536), (104, 197710934), (202, 101791768), (208, 98855467), (331, 62120656), (404, 50895884), (662, 31060328), (808, 25447942), (1313, 15660272), (1324, 15530164), (1616, 12723971), (2626, 7830136), (2648, 7765082), (2957, 6953648), (4303, 4778512), (5252, 3915068), (5296, 3882541), (5914, 3476824), (8606, 2389256), (10504, 1957534), (11828, 1738412), (17212, 1194628), (21008, 978767), (23656, 869206), (33431, 615056), (34424, 597314), (38441, 534896), (47312, 434603), (66862, 307528), (68848, 298657), (76882, 267448), (133724, 153764)]