21168783

素因数分解:

$3^4\times {\mathrm{53}}^1\times {\mathrm{4931}}^1$

素因数の和:4996

約数の個数: 20

約数和(自身を含む): 32225688

約数和(自身を除く): 11056905

約数列:

[1, 3, 9, 27, 53, 81, 159, 477, 1431, 4293, 4931, 14793, 44379, 133137, 261343, 399411, 784029, 2352087, 7056261, 21168783]

約数ペア:

[(1, 21168783), (3, 7056261), (9, 2352087), (27, 784029), (53, 399411), (81, 261343), (159, 133137), (477, 44379), (1431, 14793), (4293, 4931)]