20428639

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{151}}^1\times {\mathrm{251}}^1$

素因数の和:427

約数の個数: 24

約数和(自身を含む): 26199936

約数和(自身を除く): 5771297

約数列:

[1, 7, 11, 49, 77, 151, 251, 539, 1057, 1661, 1757, 2761, 7399, 11627, 12299, 19327, 37901, 81389, 135289, 265307, 416911, 1857149, 2918377, 20428639]

約数ペア:

[(1, 20428639), (7, 2918377), (11, 1857149), (49, 416911), (77, 265307), (151, 135289), (251, 81389), (539, 37901), (1057, 19327), (1661, 12299), (1757, 11627), (2761, 7399)]