21579561

素因数分解:

$3^3\times {\mathrm{67}}^1\times {\mathrm{79}}^1\times {\mathrm{151}}^1$

素因数の和:306

約数の個数: 32

約数和(自身を含む): 33075200

約数和(自身を除く): 11495639

約数列:

[1, 3, 9, 27, 67, 79, 151, 201, 237, 453, 603, 711, 1359, 1809, 2133, 4077, 5293, 10117, 11929, 15879, 30351, 35787, 47637, 91053, 107361, 142911, 273159, 322083, 799243, 2397729, 7193187, 21579561]

約数ペア:

[(1, 21579561), (3, 7193187), (9, 2397729), (27, 799243), (67, 322083), (79, 273159), (151, 142911), (201, 107361), (237, 91053), (453, 47637), (603, 35787), (711, 30351), (1359, 15879), (1809, 11929), (2133, 10117), (4077, 5293)]