20427639860

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{101}}^1\times {\mathrm{109}}^1\times {\mathrm{257}}^1$

素因数の和:514

約数の個数: 144

約数和(自身を含む): 46321949520

約数和(自身を除く): 25894309660

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 101, 109, 190, 202, 218, 257, 361, 380, 404, 436, 505, 514, 545, 722, 1010, 1028, 1090, 1285, 1444, 1805, 1919, 2020, 2071, 2180, 2570, 3610, 3838, 4142, 4883, 5140, 7220, 7676, 8284, 9595, 9766, 10355, 11009, 19190, 19532, 20710, 22018, 24415, 25957, 28013, 36461, 38380, 39349, 41420, 44036, 48830, 51914, 55045, 56026, 72922, 78698, 92777, 97660, 103828, 110090, 112052, 129785, 140065, 145844, 157396, 182305, 185554, 196745, 209171, 220180, 259570, 280130, 364610, 371108, 393490, 418342, 463885, 493183, 519140, 532247, 560260, 729220, 786980, 836684, 927770, 986366, 1045855, 1064494, 1855540, 1972732, 2091710, 2128988, 2465915, 2661235, 2829313, 3974249, 4183420, 4931830, 5322470, 5658626, 7948498, 9370477, 9863660, 10112693, 10644940, 11317252, 14146565, 15896996, 18740954, 19871245, 20225386, 28293130, 37481908, 39742490, 40450772, 46852385, 50563465, 53756947, 56586260, 79484980, 93704770, 101126930, 107513894, 187409540, 202253860, 215027788, 268784735, 537569470, 1021381993, 1075138940, 2042763986, 4085527972, 5106909965, 10213819930, 20427639860]

約数ペア:

[(1, 20427639860), (2, 10213819930), (4, 5106909965), (5, 4085527972), (10, 2042763986), (19, 1075138940), (20, 1021381993), (38, 537569470), (76, 268784735), (95, 215027788), (101, 202253860), (109, 187409540), (190, 107513894), (202, 101126930), (218, 93704770), (257, 79484980), (361, 56586260), (380, 53756947), (404, 50563465), (436, 46852385), (505, 40450772), (514, 39742490), (545, 37481908), (722, 28293130), (1010, 20225386), (1028, 19871245), (1090, 18740954), (1285, 15896996), (1444, 14146565), (1805, 11317252), (1919, 10644940), (2020, 10112693), (2071, 9863660), (2180, 9370477), (2570, 7948498), (3610, 5658626), (3838, 5322470), (4142, 4931830), (4883, 4183420), (5140, 3974249), (7220, 2829313), (7676, 2661235), (8284, 2465915), (9595, 2128988), (9766, 2091710), (10355, 1972732), (11009, 1855540), (19190, 1064494), (19532, 1045855), (20710, 986366), (22018, 927770), (24415, 836684), (25957, 786980), (28013, 729220), (36461, 560260), (38380, 532247), (39349, 519140), (41420, 493183), (44036, 463885), (48830, 418342), (51914, 393490), (55045, 371108), (56026, 364610), (72922, 280130), (78698, 259570), (92777, 220180), (97660, 209171), (103828, 196745), (110090, 185554), (112052, 182305), (129785, 157396), (140065, 145844)]