21197895

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{97}}^1\times {\mathrm{857}}^1$

素因数の和:979

約数の個数: 32

約数和(自身を含む): 36324288

約数和(自身を除く): 15126393

約数列:

[1, 3, 5, 15, 17, 51, 85, 97, 255, 291, 485, 857, 1455, 1649, 2571, 4285, 4947, 8245, 12855, 14569, 24735, 43707, 72845, 83129, 218535, 249387, 415645, 1246935, 1413193, 4239579, 7065965, 21197895]

約数ペア:

[(1, 21197895), (3, 7065965), (5, 4239579), (15, 1413193), (17, 1246935), (51, 415645), (85, 249387), (97, 218535), (255, 83129), (291, 72845), (485, 43707), (857, 24735), (1455, 14569), (1649, 12855), (2571, 8245), (4285, 4947)]