20419920

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{359}}^1$

素因数の和:457

約数の個数: 120

約数和(自身を含む): 69638400

約数和(自身を除く): 49218480

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 79, 80, 90, 120, 144, 158, 180, 237, 240, 316, 359, 360, 395, 474, 632, 711, 718, 720, 790, 948, 1077, 1185, 1264, 1422, 1436, 1580, 1795, 1896, 2154, 2370, 2844, 2872, 3160, 3231, 3555, 3590, 3792, 4308, 4740, 5385, 5688, 5744, 6320, 6462, 7110, 7180, 8616, 9480, 10770, 11376, 12924, 14220, 14360, 16155, 17232, 18960, 21540, 25848, 28361, 28440, 28720, 32310, 43080, 51696, 56722, 56880, 64620, 85083, 86160, 113444, 129240, 141805, 170166, 226888, 255249, 258480, 283610, 340332, 425415, 453776, 510498, 567220, 680664, 850830, 1020996, 1134440, 1276245, 1361328, 1701660, 2041992, 2268880, 2552490, 3403320, 4083984, 5104980, 6806640, 10209960, 20419920]

約数ペア:

[(1, 20419920), (2, 10209960), (3, 6806640), (4, 5104980), (5, 4083984), (6, 3403320), (8, 2552490), (9, 2268880), (10, 2041992), (12, 1701660), (15, 1361328), (16, 1276245), (18, 1134440), (20, 1020996), (24, 850830), (30, 680664), (36, 567220), (40, 510498), (45, 453776), (48, 425415), (60, 340332), (72, 283610), (79, 258480), (80, 255249), (90, 226888), (120, 170166), (144, 141805), (158, 129240), (180, 113444), (237, 86160), (240, 85083), (316, 64620), (359, 56880), (360, 56722), (395, 51696), (474, 43080), (632, 32310), (711, 28720), (718, 28440), (720, 28361), (790, 25848), (948, 21540), (1077, 18960), (1185, 17232), (1264, 16155), (1422, 14360), (1436, 14220), (1580, 12924), (1795, 11376), (1896, 10770), (2154, 9480), (2370, 8616), (2844, 7180), (2872, 7110), (3160, 6462), (3231, 6320), (3555, 5744), (3590, 5688), (3792, 5385), (4308, 4740)]