19959939

素因数分解:

$3^4\times {\mathrm{31}}^1\times {\mathrm{7949}}^1$

素因数の和:7992

約数の個数: 20

約数和(自身を含む): 30782400

約数和(自身を除く): 10822461

約数列:

[1, 3, 9, 27, 31, 81, 93, 279, 837, 2511, 7949, 23847, 71541, 214623, 246419, 643869, 739257, 2217771, 6653313, 19959939]

約数ペア:

[(1, 19959939), (3, 6653313), (9, 2217771), (27, 739257), (31, 643869), (81, 246419), (93, 214623), (279, 71541), (837, 23847), (2511, 7949)]