20718999

素因数分解:

$3^2\times 7^1\times {\mathrm{173}}^1\times {\mathrm{1901}}^1$

素因数の和:2087

約数の個数: 24

約数和(自身を含む): 34418592

約数和(自身を除く): 13699593

約数列:

[1, 3, 7, 9, 21, 63, 173, 519, 1211, 1557, 1901, 3633, 5703, 10899, 13307, 17109, 39921, 119763, 328873, 986619, 2302111, 2959857, 6906333, 20718999]

約数ペア:

[(1, 20718999), (3, 6906333), (7, 2959857), (9, 2302111), (21, 986619), (63, 328873), (173, 119763), (519, 39921), (1211, 17109), (1557, 13307), (1901, 10899), (3633, 5703)]