21691527

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{857}}^1$

素因数の和:943

約数の個数: 32

約数和(自身を含む): 34594560

約数和(自身を除く): 12903033

約数列:

[1, 3, 11, 13, 33, 39, 59, 143, 177, 429, 649, 767, 857, 1947, 2301, 2571, 8437, 9427, 11141, 25311, 28281, 33423, 50563, 122551, 151689, 367653, 556193, 657319, 1668579, 1971957, 7230509, 21691527]

約数ペア:

[(1, 21691527), (3, 7230509), (11, 1971957), (13, 1668579), (33, 657319), (39, 556193), (59, 367653), (143, 151689), (177, 122551), (429, 50563), (649, 33423), (767, 28281), (857, 25311), (1947, 11141), (2301, 9427), (2571, 8437)]