20391480

素因数分解:

$2^3\times 3^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{239}}^1$

素因数の和:338

約数の個数: 128

約数和(自身を含む): 69120000

約数和(自身を除く): 48728520

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 36, 40, 45, 54, 60, 72, 79, 90, 108, 120, 135, 158, 180, 216, 237, 239, 270, 316, 360, 395, 474, 478, 540, 632, 711, 717, 790, 948, 956, 1080, 1185, 1195, 1422, 1434, 1580, 1896, 1912, 2133, 2151, 2370, 2390, 2844, 2868, 3160, 3555, 3585, 4266, 4302, 4740, 4780, 5688, 5736, 6453, 7110, 7170, 8532, 8604, 9480, 9560, 10665, 10755, 12906, 14220, 14340, 17064, 17208, 18881, 21330, 21510, 25812, 28440, 28680, 32265, 37762, 42660, 43020, 51624, 56643, 64530, 75524, 85320, 86040, 94405, 113286, 129060, 151048, 169929, 188810, 226572, 258120, 283215, 339858, 377620, 453144, 509787, 566430, 679716, 755240, 849645, 1019574, 1132860, 1359432, 1699290, 2039148, 2265720, 2548935, 3398580, 4078296, 5097870, 6797160, 10195740, 20391480]

約数ペア:

[(1, 20391480), (2, 10195740), (3, 6797160), (4, 5097870), (5, 4078296), (6, 3398580), (8, 2548935), (9, 2265720), (10, 2039148), (12, 1699290), (15, 1359432), (18, 1132860), (20, 1019574), (24, 849645), (27, 755240), (30, 679716), (36, 566430), (40, 509787), (45, 453144), (54, 377620), (60, 339858), (72, 283215), (79, 258120), (90, 226572), (108, 188810), (120, 169929), (135, 151048), (158, 129060), (180, 113286), (216, 94405), (237, 86040), (239, 85320), (270, 75524), (316, 64530), (360, 56643), (395, 51624), (474, 43020), (478, 42660), (540, 37762), (632, 32265), (711, 28680), (717, 28440), (790, 25812), (948, 21510), (956, 21330), (1080, 18881), (1185, 17208), (1195, 17064), (1422, 14340), (1434, 14220), (1580, 12906), (1896, 10755), (1912, 10665), (2133, 9560), (2151, 9480), (2370, 8604), (2390, 8532), (2844, 7170), (2868, 7110), (3160, 6453), (3555, 5736), (3585, 5688), (4266, 4780), (4302, 4740)]