19898120

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{1103}}^1$

素因数の和:1166

約数の個数: 64

約数和(自身を含む): 50077440

約数和(自身を除く): 30179320

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 41, 44, 55, 82, 88, 110, 164, 205, 220, 328, 410, 440, 451, 820, 902, 1103, 1640, 1804, 2206, 2255, 3608, 4412, 4510, 5515, 8824, 9020, 11030, 12133, 18040, 22060, 24266, 44120, 45223, 48532, 60665, 90446, 97064, 121330, 180892, 226115, 242660, 361784, 452230, 485320, 497453, 904460, 994906, 1808920, 1989812, 2487265, 3979624, 4974530, 9949060, 19898120]

約数ペア:

[(1, 19898120), (2, 9949060), (4, 4974530), (5, 3979624), (8, 2487265), (10, 1989812), (11, 1808920), (20, 994906), (22, 904460), (40, 497453), (41, 485320), (44, 452230), (55, 361784), (82, 242660), (88, 226115), (110, 180892), (164, 121330), (205, 97064), (220, 90446), (328, 60665), (410, 48532), (440, 45223), (451, 44120), (820, 24266), (902, 22060), (1103, 18040), (1640, 12133), (1804, 11030), (2206, 9020), (2255, 8824), (3608, 5515), (4412, 4510)]