259979330

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^2\times {\mathrm{2081}}^1$

素因数の和:2163

約数の個数: 48

約数和(自身を含む): 520991352

約数和(自身を除く): 261012022

約数列:

[1, 2, 5, 10, 13, 26, 31, 62, 65, 130, 155, 310, 403, 806, 961, 1922, 2015, 2081, 4030, 4162, 4805, 9610, 10405, 12493, 20810, 24986, 27053, 54106, 62465, 64511, 124930, 129022, 135265, 270530, 322555, 645110, 838643, 1677286, 1999841, 3999682, 4193215, 8386430, 9999205, 19998410, 25997933, 51995866, 129989665, 259979330]

約数ペア:

[(1, 259979330), (2, 129989665), (5, 51995866), (10, 25997933), (13, 19998410), (26, 9999205), (31, 8386430), (62, 4193215), (65, 3999682), (130, 1999841), (155, 1677286), (310, 838643), (403, 645110), (806, 322555), (961, 270530), (1922, 135265), (2015, 129022), (2081, 124930), (4030, 64511), (4162, 62465), (4805, 54106), (9610, 27053), (10405, 24986), (12493, 20810)]