19965491

素因数分解:

$7^2\times {\mathrm{13}}^2\times {\mathrm{2411}}^1$

素因数の和:2451

約数の個数: 18

約数和(自身を含む): 25159572

約数和(自身を除く): 5194081

約数列:

[1, 7, 13, 49, 91, 169, 637, 1183, 2411, 8281, 16877, 31343, 118139, 219401, 407459, 1535807, 2852213, 19965491]

約数ペア:

[(1, 19965491), (7, 2852213), (13, 1535807), (49, 407459), (91, 219401), (169, 118139), (637, 31343), (1183, 16877), (2411, 8281)]