21561819

素因数分解:

$3^1\times {\mathrm{29}}^1\times {\mathrm{139}}^1\times {\mathrm{1783}}^1$

素因数の和:1954

約数の個数: 16

約数和(自身を含む): 29971200

約数和(自身を除く): 8409381

約数列:

[1, 3, 29, 87, 139, 417, 1783, 4031, 5349, 12093, 51707, 155121, 247837, 743511, 7187273, 21561819]

約数ペア:

[(1, 21561819), (3, 7187273), (29, 743511), (87, 247837), (139, 155121), (417, 51707), (1783, 12093), (4031, 5349)]