20687859

素因数分解:

$3^3\times {\mathrm{43}}^1\times {\mathrm{103}}^1\times {\mathrm{173}}^1$

素因数の和:328

約数の個数: 32

約数和(自身を含む): 31848960

約数和(自身を除く): 11161101

約数列:

[1, 3, 9, 27, 43, 103, 129, 173, 309, 387, 519, 927, 1161, 1557, 2781, 4429, 4671, 7439, 13287, 17819, 22317, 39861, 53457, 66951, 119583, 160371, 200853, 481113, 766217, 2298651, 6895953, 20687859]

約数ペア:

[(1, 20687859), (3, 6895953), (9, 2298651), (27, 766217), (43, 481113), (103, 200853), (129, 160371), (173, 119583), (309, 66951), (387, 53457), (519, 39861), (927, 22317), (1161, 17819), (1557, 13287), (2781, 7439), (4429, 4671)]