19780137

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{293}}^1\times {\mathrm{577}}^1$

素因数の和:889

約数の個数: 24

約数和(自身を含む): 30927624

約数和(自身を除く): 11147487

約数列:

[1, 3, 9, 13, 39, 117, 293, 577, 879, 1731, 2637, 3809, 5193, 7501, 11427, 22503, 34281, 67509, 169061, 507183, 1521549, 2197793, 6593379, 19780137]

約数ペア:

[(1, 19780137), (3, 6593379), (9, 2197793), (13, 1521549), (39, 507183), (117, 169061), (293, 67509), (577, 34281), (879, 22503), (1731, 11427), (2637, 7501), (3809, 5193)]