20784477

素因数分解:

$3^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{4561}}^1$

素因数の和:4609

約数の個数: 24

約数和(自身を含む): 33284352

約数和(自身を除く): 12499875

約数列:

[1, 3, 7, 21, 31, 49, 93, 147, 217, 651, 1519, 4557, 4561, 13683, 31927, 95781, 141391, 223489, 424173, 670467, 989737, 2969211, 6928159, 20784477]

約数ペア:

[(1, 20784477), (3, 6928159), (7, 2969211), (21, 989737), (31, 670467), (49, 424173), (93, 223489), (147, 141391), (217, 95781), (651, 31927), (1519, 13683), (4557, 4561)]