21500171

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{113}}^1\times {\mathrm{353}}^1$

素因数の和:491

約数の個数: 24

約数和(自身を含む): 27603504

約数和(自身を除く): 6103333

約数列:

[1, 7, 11, 49, 77, 113, 353, 539, 791, 1243, 2471, 3883, 5537, 8701, 17297, 27181, 39889, 60907, 190267, 279223, 438779, 1954561, 3071453, 21500171]

約数ペア:

[(1, 21500171), (7, 3071453), (11, 1954561), (49, 438779), (77, 279223), (113, 190267), (353, 60907), (539, 39889), (791, 27181), (1243, 17297), (2471, 8701), (3883, 5537)]