20913760

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{263}}^1$

素因数の和:356

約数の個数: 96

約数和(自身を含む): 57480192

約数和(自身を除く): 36566432

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 70, 71, 80, 112, 140, 142, 160, 224, 263, 280, 284, 355, 497, 526, 560, 568, 710, 994, 1052, 1120, 1136, 1315, 1420, 1841, 1988, 2104, 2272, 2485, 2630, 2840, 3682, 3976, 4208, 4970, 5260, 5680, 7364, 7952, 8416, 9205, 9940, 10520, 11360, 14728, 15904, 18410, 18673, 19880, 21040, 29456, 36820, 37346, 39760, 42080, 58912, 73640, 74692, 79520, 93365, 130711, 147280, 149384, 186730, 261422, 294560, 298768, 373460, 522844, 597536, 653555, 746920, 1045688, 1307110, 1493840, 2091376, 2614220, 2987680, 4182752, 5228440, 10456880, 20913760]

約数ペア:

[(1, 20913760), (2, 10456880), (4, 5228440), (5, 4182752), (7, 2987680), (8, 2614220), (10, 2091376), (14, 1493840), (16, 1307110), (20, 1045688), (28, 746920), (32, 653555), (35, 597536), (40, 522844), (56, 373460), (70, 298768), (71, 294560), (80, 261422), (112, 186730), (140, 149384), (142, 147280), (160, 130711), (224, 93365), (263, 79520), (280, 74692), (284, 73640), (355, 58912), (497, 42080), (526, 39760), (560, 37346), (568, 36820), (710, 29456), (994, 21040), (1052, 19880), (1120, 18673), (1136, 18410), (1315, 15904), (1420, 14728), (1841, 11360), (1988, 10520), (2104, 9940), (2272, 9205), (2485, 8416), (2630, 7952), (2840, 7364), (3682, 5680), (3976, 5260), (4208, 4970)]