20213389

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{223}}^1\times {\mathrm{563}}^1$

素因数の和:816

約数の個数: 16

約数和(自身を含む): 24256512

約数和(自身を除く): 4043123

約数列:

[1, 7, 23, 161, 223, 563, 1561, 3941, 5129, 12949, 35903, 90643, 125549, 878843, 2887627, 20213389]

約数ペア:

[(1, 20213389), (7, 2887627), (23, 878843), (161, 125549), (223, 90643), (563, 35903), (1561, 12949), (3941, 5129)]