20887516

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{197}}^1\times {\mathrm{2039}}^1$

素因数の和:2253

約数の個数: 24

約数和(自身を含む): 39584160

約数和(自身を除く): 18696644

約数列:

[1, 2, 4, 13, 26, 52, 197, 394, 788, 2039, 2561, 4078, 5122, 8156, 10244, 26507, 53014, 106028, 401683, 803366, 1606732, 5221879, 10443758, 20887516]

約数ペア:

[(1, 20887516), (2, 10443758), (4, 5221879), (13, 1606732), (26, 803366), (52, 401683), (197, 106028), (394, 53014), (788, 26507), (2039, 10244), (2561, 8156), (4078, 5122)]