19978965

素因数分解:

$3^2\times 5^1\times {\mathrm{113}}^1\times {\mathrm{3929}}^1$

素因数の和:4053

約数の個数: 24

約数和(自身を含む): 34945560

約数和(自身を除く): 14966595

約数列:

[1, 3, 5, 9, 15, 45, 113, 339, 565, 1017, 1695, 3929, 5085, 11787, 19645, 35361, 58935, 176805, 443977, 1331931, 2219885, 3995793, 6659655, 19978965]

約数ペア:

[(1, 19978965), (3, 6659655), (5, 3995793), (9, 2219885), (15, 1331931), (45, 443977), (113, 176805), (339, 58935), (565, 35361), (1017, 19645), (1695, 11787), (3929, 5085)]