19720389

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{4639}}^1$

素因数の和:4764

約数の個数: 16

約数和(自身を含む): 28582400

約数和(自身を除く): 8862011

約数列:

[1, 3, 13, 39, 109, 327, 1417, 4251, 4639, 13917, 60307, 180921, 505651, 1516953, 6573463, 19720389]

約数ペア:

[(1, 19720389), (3, 6573463), (13, 1516953), (39, 505651), (109, 180921), (327, 60307), (1417, 13917), (4251, 4639)]