19929807

素因数分解:

$3^4\times {\mathrm{31}}^1\times {\mathrm{7937}}^1$

素因数の和:7980

約数の個数: 20

約数和(自身を含む): 30735936

約数和(自身を除く): 10806129

約数列:

[1, 3, 9, 27, 31, 81, 93, 279, 837, 2511, 7937, 23811, 71433, 214299, 246047, 642897, 738141, 2214423, 6643269, 19929807]

約数ペア:

[(1, 19929807), (3, 6643269), (9, 2214423), (27, 738141), (31, 642897), (81, 246047), (93, 214299), (279, 71433), (837, 23811), (2511, 7937)]