521559

素因数分解:

$3^4\times {\mathrm{47}}^1\times {\mathrm{137}}^1$

素因数の和:196

約数の個数: 20

約数和(自身を含む): 801504

約数和(自身を除く): 279945

約数列:

[1, 3, 9, 27, 47, 81, 137, 141, 411, 423, 1233, 1269, 3699, 3807, 6439, 11097, 19317, 57951, 173853, 521559]

約数ペア:

[(1, 521559), (3, 173853), (9, 57951), (27, 19317), (47, 11097), (81, 6439), (137, 3807), (141, 3699), (411, 1269), (423, 1233)]