20947719

素因数分解:

$3^1\times {\mathrm{13}}^2\times {\mathrm{79}}^1\times {\mathrm{523}}^1$

素因数の和:631

約数の個数: 24

約数和(自身を含む): 30685440

約数和(自身を除く): 9737721

約数列:

[1, 3, 13, 39, 79, 169, 237, 507, 523, 1027, 1569, 3081, 6799, 13351, 20397, 40053, 41317, 88387, 123951, 265161, 537121, 1611363, 6982573, 20947719]

約数ペア:

[(1, 20947719), (3, 6982573), (13, 1611363), (39, 537121), (79, 265161), (169, 123951), (237, 88387), (507, 41317), (523, 40053), (1027, 20397), (1569, 13351), (3081, 6799)]