21986901

素因数分解:

$3^2\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{1381}}^1$

素因数の和:1477

約数の個数: 24

約数和(自身を含む): 33416760

約数和(自身を除く): 11429859

約数列:

[1, 3, 9, 29, 61, 87, 183, 261, 549, 1381, 1769, 4143, 5307, 12429, 15921, 40049, 84241, 120147, 252723, 360441, 758169, 2442989, 7328967, 21986901]

約数ペア:

[(1, 21986901), (3, 7328967), (9, 2442989), (29, 758169), (61, 360441), (87, 252723), (183, 120147), (261, 84241), (549, 40049), (1381, 15921), (1769, 12429), (4143, 5307)]