21055797

素因数分解:

$3^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{5479}}^1$

素因数の和:5553

約数の個数: 24

約数和(自身を含む): 35335040

約数和(自身を除く): 14279243

約数列:

[1, 3, 7, 9, 21, 61, 63, 183, 427, 549, 1281, 3843, 5479, 16437, 38353, 49311, 115059, 334219, 345177, 1002657, 2339533, 3007971, 7018599, 21055797]

約数ペア:

[(1, 21055797), (3, 7018599), (7, 3007971), (9, 2339533), (21, 1002657), (61, 345177), (63, 334219), (183, 115059), (427, 49311), (549, 38353), (1281, 16437), (3843, 5479)]