19903359

素因数分解:

$3^1\times 7^2\times {\mathrm{71}}^1\times {\mathrm{1907}}^1$

素因数の和:1995

約数の個数: 24

約数和(自身を含む): 31321728

約数和(自身を除く): 11418369

約数列:

[1, 3, 7, 21, 49, 71, 147, 213, 497, 1491, 1907, 3479, 5721, 10437, 13349, 40047, 93443, 135397, 280329, 406191, 947779, 2843337, 6634453, 19903359]

約数ペア:

[(1, 19903359), (3, 6634453), (7, 2843337), (21, 947779), (49, 406191), (71, 280329), (147, 135397), (213, 93443), (497, 40047), (1491, 13349), (1907, 10437), (3479, 5721)]