20921853

素因数分解:

$3^1\times {\mathrm{89}}^1\times {\mathrm{127}}^1\times {\mathrm{617}}^1$

素因数の和:836

約数の個数: 16

約数和(自身を含む): 28477440

約数和(自身を除く): 7555587

約数列:

[1, 3, 89, 127, 267, 381, 617, 1851, 11303, 33909, 54913, 78359, 164739, 235077, 6973951, 20921853]

約数ペア:

[(1, 20921853), (3, 6973951), (89, 235077), (127, 164739), (267, 78359), (381, 54913), (617, 33909), (1851, 11303)]