20817836

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{6563}}^1$

素因数の和:6641

約数の個数: 24

約数和(自身を含む): 39882864

約数和(自身を除く): 19065028

約数列:

[1, 2, 4, 13, 26, 52, 61, 122, 244, 793, 1586, 3172, 6563, 13126, 26252, 85319, 170638, 341276, 400343, 800686, 1601372, 5204459, 10408918, 20817836]

約数ペア:

[(1, 20817836), (2, 10408918), (4, 5204459), (13, 1601372), (26, 800686), (52, 400343), (61, 341276), (122, 170638), (244, 85319), (793, 26252), (1586, 13126), (3172, 6563)]