21708357

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{397}}^1\times {\mathrm{1657}}^1$

素因数の和:2068

約数の個数: 16

約数和(自身を含む): 31674432

約数和(自身を除く): 9966075

約数列:

[1, 3, 11, 33, 397, 1191, 1657, 4367, 4971, 13101, 18227, 54681, 657829, 1973487, 7236119, 21708357]

約数ペア:

[(1, 21708357), (3, 7236119), (11, 1973487), (33, 657829), (397, 54681), (1191, 18227), (1657, 13101), (4367, 4971)]