21553779

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{419}}^1\times {\mathrm{1319}}^1$

素因数の和:1754

約数の個数: 16

約数和(自身を含む): 31046400

約数和(自身を除く): 9492621

約数列:

[1, 3, 13, 39, 419, 1257, 1319, 3957, 5447, 16341, 17147, 51441, 552661, 1657983, 7184593, 21553779]

約数ペア:

[(1, 21553779), (3, 7184593), (13, 1657983), (39, 552661), (419, 51441), (1257, 17147), (1319, 16341), (3957, 5447)]