19218721

素因数分解:

${\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{431}}^1$

素因数の和:552

約数の個数: 16

約数和(自身を含む): 21212928

約数和(自身を除く): 1994207

約数列:

[1, 17, 43, 61, 431, 731, 1037, 2623, 7327, 18533, 26291, 44591, 315061, 446947, 1130513, 19218721]

約数ペア:

[(1, 19218721), (17, 1130513), (43, 446947), (61, 315061), (431, 44591), (731, 26291), (1037, 18533), (2623, 7327)]