31781997

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{90547}}^1$

素因数の和:90569

約数の個数: 16

約数和(自身を含む): 50706880

約数和(自身を除く): 18924883

約数列:

[1, 3, 9, 13, 27, 39, 117, 351, 90547, 271641, 814923, 1177111, 2444769, 3531333, 10593999, 31781997]

約数ペア:

[(1, 31781997), (3, 10593999), (9, 3531333), (13, 2444769), (27, 1177111), (39, 814923), (117, 271641), (351, 90547)]