20856717

素因数分解:

$3^3\times 7^1\times {\mathrm{211}}^1\times {\mathrm{523}}^1$

素因数の和:750

約数の個数: 32

約数和(自身を含む): 35548160

約数和(自身を除く): 14691443

約数列:

[1, 3, 7, 9, 21, 27, 63, 189, 211, 523, 633, 1477, 1569, 1899, 3661, 4431, 4707, 5697, 10983, 13293, 14121, 32949, 39879, 98847, 110353, 331059, 772471, 993177, 2317413, 2979531, 6952239, 20856717]

約数ペア:

[(1, 20856717), (3, 6952239), (7, 2979531), (9, 2317413), (21, 993177), (27, 772471), (63, 331059), (189, 110353), (211, 98847), (523, 39879), (633, 32949), (1477, 14121), (1569, 13293), (1899, 10983), (3661, 5697), (4431, 4707)]