20790819

素因数分解:

$3^2\times 7^1\times {\mathrm{523}}^1\times {\mathrm{631}}^1$

素因数の和:1167

約数の個数: 24

約数和(自身を含む): 34441472

約数和(自身を除く): 13650653

約数列:

[1, 3, 7, 9, 21, 63, 523, 631, 1569, 1893, 3661, 4417, 4707, 5679, 10983, 13251, 32949, 39753, 330013, 990039, 2310091, 2970117, 6930273, 20790819]

約数ペア:

[(1, 20790819), (3, 6930273), (7, 2970117), (9, 2310091), (21, 990039), (63, 330013), (523, 39753), (631, 32949), (1569, 13251), (1893, 10983), (3661, 5679), (4417, 4707)]