21098178

素因数分解:

$2^1\times 3^3\times {\mathrm{390707}}^1$

素因数の和:390718

約数の個数: 16

約数和(自身を含む): 46884960

約数和(自身を除く): 25786782

約数列:

[1, 2, 3, 6, 9, 18, 27, 54, 390707, 781414, 1172121, 2344242, 3516363, 7032726, 10549089, 21098178]

約数ペア:

[(1, 21098178), (2, 10549089), (3, 7032726), (6, 3516363), (9, 2344242), (18, 1172121), (27, 781414), (54, 390707)]