81739980

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{2237}}^1$

素因数の和:2288

約数の個数: 144

約数和(自身を含む): 293267520

約数和(自身を除く): 211527540

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 29, 30, 35, 36, 42, 45, 58, 60, 63, 70, 84, 87, 90, 105, 116, 126, 140, 145, 174, 180, 203, 210, 252, 261, 290, 315, 348, 406, 420, 435, 522, 580, 609, 630, 812, 870, 1015, 1044, 1218, 1260, 1305, 1740, 1827, 2030, 2237, 2436, 2610, 3045, 3654, 4060, 4474, 5220, 6090, 6711, 7308, 8948, 9135, 11185, 12180, 13422, 15659, 18270, 20133, 22370, 26844, 31318, 33555, 36540, 40266, 44740, 46977, 62636, 64873, 67110, 78295, 80532, 93954, 100665, 129746, 134220, 140931, 156590, 187908, 194619, 201330, 234885, 259492, 281862, 313180, 324365, 389238, 402660, 454111, 469770, 563724, 583857, 648730, 704655, 778476, 908222, 939540, 973095, 1167714, 1297460, 1362333, 1409310, 1816444, 1946190, 2270555, 2335428, 2724666, 2818620, 2919285, 3892380, 4086999, 4541110, 5449332, 5838570, 6811665, 8173998, 9082220, 11677140, 13623330, 16347996, 20434995, 27246660, 40869990, 81739980]

約数ペア:

[(1, 81739980), (2, 40869990), (3, 27246660), (4, 20434995), (5, 16347996), (6, 13623330), (7, 11677140), (9, 9082220), (10, 8173998), (12, 6811665), (14, 5838570), (15, 5449332), (18, 4541110), (20, 4086999), (21, 3892380), (28, 2919285), (29, 2818620), (30, 2724666), (35, 2335428), (36, 2270555), (42, 1946190), (45, 1816444), (58, 1409310), (60, 1362333), (63, 1297460), (70, 1167714), (84, 973095), (87, 939540), (90, 908222), (105, 778476), (116, 704655), (126, 648730), (140, 583857), (145, 563724), (174, 469770), (180, 454111), (203, 402660), (210, 389238), (252, 324365), (261, 313180), (290, 281862), (315, 259492), (348, 234885), (406, 201330), (420, 194619), (435, 187908), (522, 156590), (580, 140931), (609, 134220), (630, 129746), (812, 100665), (870, 93954), (1015, 80532), (1044, 78295), (1218, 67110), (1260, 64873), (1305, 62636), (1740, 46977), (1827, 44740), (2030, 40266), (2237, 36540), (2436, 33555), (2610, 31318), (3045, 26844), (3654, 22370), (4060, 20133), (4474, 18270), (5220, 15659), (6090, 13422), (6711, 12180), (7308, 11185), (8948, 9135)]