21351160

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{277}}^1$

素因数の和:376

約数の個数: 64

約数和(自身を含む): 50440320

約数和(自身を除く): 29089160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 47, 82, 94, 164, 188, 205, 235, 277, 328, 376, 410, 470, 554, 820, 940, 1108, 1385, 1640, 1880, 1927, 2216, 2770, 3854, 5540, 7708, 9635, 11080, 11357, 13019, 15416, 19270, 22714, 26038, 38540, 45428, 52076, 56785, 65095, 77080, 90856, 104152, 113570, 130190, 227140, 260380, 454280, 520760, 533779, 1067558, 2135116, 2668895, 4270232, 5337790, 10675580, 21351160]

約数ペア:

[(1, 21351160), (2, 10675580), (4, 5337790), (5, 4270232), (8, 2668895), (10, 2135116), (20, 1067558), (40, 533779), (41, 520760), (47, 454280), (82, 260380), (94, 227140), (164, 130190), (188, 113570), (205, 104152), (235, 90856), (277, 77080), (328, 65095), (376, 56785), (410, 52076), (470, 45428), (554, 38540), (820, 26038), (940, 22714), (1108, 19270), (1385, 15416), (1640, 13019), (1880, 11357), (1927, 11080), (2216, 9635), (2770, 7708), (3854, 5540)]