78161720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{197}}^1$

素因数の和:337

約数の個数: 128

約数和(自身を含む): 219542400

約数和(自身を除く): 141380680

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 35, 40, 52, 56, 65, 70, 91, 104, 109, 130, 140, 182, 197, 218, 260, 280, 364, 394, 436, 455, 520, 545, 728, 763, 788, 872, 910, 985, 1090, 1379, 1417, 1526, 1576, 1820, 1970, 2180, 2561, 2758, 2834, 3052, 3640, 3815, 3940, 4360, 5122, 5516, 5668, 6104, 6895, 7085, 7630, 7880, 9919, 10244, 11032, 11336, 12805, 13790, 14170, 15260, 17927, 19838, 20488, 21473, 25610, 27580, 28340, 30520, 35854, 39676, 42946, 49595, 51220, 55160, 56680, 71708, 79352, 85892, 89635, 99190, 102440, 107365, 143416, 150311, 171784, 179270, 198380, 214730, 279149, 300622, 358540, 396760, 429460, 558298, 601244, 717080, 751555, 858920, 1116596, 1202488, 1395745, 1503110, 1954043, 2233192, 2791490, 3006220, 3908086, 5582980, 6012440, 7816172, 9770215, 11165960, 15632344, 19540430, 39080860, 78161720]

約数ペア:

[(1, 78161720), (2, 39080860), (4, 19540430), (5, 15632344), (7, 11165960), (8, 9770215), (10, 7816172), (13, 6012440), (14, 5582980), (20, 3908086), (26, 3006220), (28, 2791490), (35, 2233192), (40, 1954043), (52, 1503110), (56, 1395745), (65, 1202488), (70, 1116596), (91, 858920), (104, 751555), (109, 717080), (130, 601244), (140, 558298), (182, 429460), (197, 396760), (218, 358540), (260, 300622), (280, 279149), (364, 214730), (394, 198380), (436, 179270), (455, 171784), (520, 150311), (545, 143416), (728, 107365), (763, 102440), (788, 99190), (872, 89635), (910, 85892), (985, 79352), (1090, 71708), (1379, 56680), (1417, 55160), (1526, 51220), (1576, 49595), (1820, 42946), (1970, 39676), (2180, 35854), (2561, 30520), (2758, 28340), (2834, 27580), (3052, 25610), (3640, 21473), (3815, 20488), (3940, 19838), (4360, 17927), (5122, 15260), (5516, 14170), (5668, 13790), (6104, 12805), (6895, 11336), (7085, 11032), (7630, 10244), (7880, 9919)]