21055221

素因数分解:

$3^5\times {\mathrm{11}}^1\times {\mathrm{7877}}^1$

素因数の和:7903

約数の個数: 24

約数和(自身を含む): 34411104

約数和(自身を除く): 13355883

約数列:

[1, 3, 9, 11, 27, 33, 81, 99, 243, 297, 891, 2673, 7877, 23631, 70893, 86647, 212679, 259941, 638037, 779823, 1914111, 2339469, 7018407, 21055221]

約数ペア:

[(1, 21055221), (3, 7018407), (9, 2339469), (11, 1914111), (27, 779823), (33, 638037), (81, 259941), (99, 212679), (243, 86647), (297, 70893), (891, 23631), (2673, 7877)]