21785520

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{2111}}^1$

素因数の和:2170

約数の個数: 80

約数和(自身を含む): 69138432

約数和(自身を除く): 47352912

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 43, 48, 60, 80, 86, 120, 129, 172, 215, 240, 258, 344, 430, 516, 645, 688, 860, 1032, 1290, 1720, 2064, 2111, 2580, 3440, 4222, 5160, 6333, 8444, 10320, 10555, 12666, 16888, 21110, 25332, 31665, 33776, 42220, 50664, 63330, 84440, 90773, 101328, 126660, 168880, 181546, 253320, 272319, 363092, 453865, 506640, 544638, 726184, 907730, 1089276, 1361595, 1452368, 1815460, 2178552, 2723190, 3630920, 4357104, 5446380, 7261840, 10892760, 21785520]

約数ペア:

[(1, 21785520), (2, 10892760), (3, 7261840), (4, 5446380), (5, 4357104), (6, 3630920), (8, 2723190), (10, 2178552), (12, 1815460), (15, 1452368), (16, 1361595), (20, 1089276), (24, 907730), (30, 726184), (40, 544638), (43, 506640), (48, 453865), (60, 363092), (80, 272319), (86, 253320), (120, 181546), (129, 168880), (172, 126660), (215, 101328), (240, 90773), (258, 84440), (344, 63330), (430, 50664), (516, 42220), (645, 33776), (688, 31665), (860, 25332), (1032, 21110), (1290, 16888), (1720, 12666), (2064, 10555), (2111, 10320), (2580, 8444), (3440, 6333), (4222, 5160)]