19900917

素因数分解:

$3^3\times {\mathrm{53}}^1\times {\mathrm{13907}}^1$

素因数の和:13969

約数の個数: 16

約数和(自身を含む): 30041280

約数和(自身を除く): 10140363

約数列:

[1, 3, 9, 27, 53, 159, 477, 1431, 13907, 41721, 125163, 375489, 737071, 2211213, 6633639, 19900917]

約数ペア:

[(1, 19900917), (3, 6633639), (9, 2211213), (27, 737071), (53, 375489), (159, 125163), (477, 41721), (1431, 13907)]