20787.000000

素因数分解:

$2^4\times {\mathrm{61}}^1\times {\mathrm{503}}^1$

素因数の和:572

約数の個数: 20

約数和(自身を含む): 968688

約数和(自身を除く): 477760

約数列:

[1, 2, 4, 8, 16, 61, 122, 244, 488, 503, 976, 1006, 2012, 4024, 8048, 30683, 61366, 122732, 245464, 490928]

約数ペア:

[(1, 490928), (2, 245464), (4, 122732), (8, 61366), (16, 30683), (61, 8048), (122, 4024), (244, 2012), (488, 1006), (503, 976)]