21451779

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{331}}^1\times {\mathrm{379}}^1$

素因数の和:735

約数の個数: 24

約数和(自身を含む): 32801600

約数和(自身を除く): 11349821

約数列:

[1, 3, 9, 19, 57, 171, 331, 379, 993, 1137, 2979, 3411, 6289, 7201, 18867, 21603, 56601, 64809, 125449, 376347, 1129041, 2383531, 7150593, 21451779]

約数ペア:

[(1, 21451779), (3, 7150593), (9, 2383531), (19, 1129041), (57, 376347), (171, 125449), (331, 64809), (379, 56601), (993, 21603), (1137, 18867), (2979, 7201), (3411, 6289)]