890001560

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{113}}^1\times {\mathrm{1223}}^1$

素因数の和:1377

約数の個数: 128

約数和(自身を含む): 2411182080

約数和(自身を除く): 1521180520

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 23, 28, 35, 40, 46, 56, 70, 92, 113, 115, 140, 161, 184, 226, 230, 280, 322, 452, 460, 565, 644, 791, 805, 904, 920, 1130, 1223, 1288, 1582, 1610, 2260, 2446, 2599, 3164, 3220, 3955, 4520, 4892, 5198, 6115, 6328, 6440, 7910, 8561, 9784, 10396, 12230, 12995, 15820, 17122, 18193, 20792, 24460, 25990, 28129, 31640, 34244, 36386, 42805, 48920, 51980, 56258, 68488, 72772, 85610, 90965, 103960, 112516, 138199, 140645, 145544, 171220, 181930, 196903, 225032, 276398, 281290, 342440, 363860, 393806, 552796, 562580, 690995, 727720, 787612, 967393, 984515, 1105592, 1125160, 1381990, 1575224, 1934786, 1969030, 2763980, 3178577, 3869572, 3938060, 4836965, 5527960, 6357154, 7739144, 7876120, 9673930, 12714308, 15892885, 19347860, 22250039, 25428616, 31785770, 38695720, 44500078, 63571540, 89000156, 111250195, 127143080, 178000312, 222500390, 445000780, 890001560]

約数ペア:

[(1, 890001560), (2, 445000780), (4, 222500390), (5, 178000312), (7, 127143080), (8, 111250195), (10, 89000156), (14, 63571540), (20, 44500078), (23, 38695720), (28, 31785770), (35, 25428616), (40, 22250039), (46, 19347860), (56, 15892885), (70, 12714308), (92, 9673930), (113, 7876120), (115, 7739144), (140, 6357154), (161, 5527960), (184, 4836965), (226, 3938060), (230, 3869572), (280, 3178577), (322, 2763980), (452, 1969030), (460, 1934786), (565, 1575224), (644, 1381990), (791, 1125160), (805, 1105592), (904, 984515), (920, 967393), (1130, 787612), (1223, 727720), (1288, 690995), (1582, 562580), (1610, 552796), (2260, 393806), (2446, 363860), (2599, 342440), (3164, 281290), (3220, 276398), (3955, 225032), (4520, 196903), (4892, 181930), (5198, 171220), (6115, 145544), (6328, 140645), (6440, 138199), (7910, 112516), (8561, 103960), (9784, 90965), (10396, 85610), (12230, 72772), (12995, 68488), (15820, 56258), (17122, 51980), (18193, 48920), (20792, 42805), (24460, 36386), (25990, 34244), (28129, 31640)]