19719999

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{5437}}^1$

素因数の和:5487

約数の個数: 24

約数和(自身を含む): 31670912

約数和(自身を除く): 11950913

約数列:

[1, 3, 9, 13, 31, 39, 93, 117, 279, 403, 1209, 3627, 5437, 16311, 48933, 70681, 168547, 212043, 505641, 636129, 1516923, 2191111, 6573333, 19719999]

約数ペア:

[(1, 19719999), (3, 6573333), (9, 2191111), (13, 1516923), (31, 636129), (39, 505641), (93, 212043), (117, 168547), (279, 70681), (403, 48933), (1209, 16311), (3627, 5437)]