19717299

素因数分解:

$3^2\times 7^1\times {\mathrm{47}}^1\times {\mathrm{6659}}^1$

素因数の和:6719

約数の個数: 24

約数和(自身を含む): 33246720

約数和(自身を除く): 13529421

約数列:

[1, 3, 7, 9, 21, 47, 63, 141, 329, 423, 987, 2961, 6659, 19977, 46613, 59931, 139839, 312973, 419517, 938919, 2190811, 2816757, 6572433, 19717299]

約数ペア:

[(1, 19717299), (3, 6572433), (7, 2816757), (9, 2190811), (21, 938919), (47, 419517), (63, 312973), (141, 139839), (329, 59931), (423, 46613), (987, 19977), (2961, 6659)]