20881553

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{139}}^1\times {\mathrm{1951}}^1$

素因数の和:2108

約数の個数: 16

約数和(自身を含む): 26234880

約数和(自身を除く): 5353327

約数列:

[1, 7, 11, 77, 139, 973, 1529, 1951, 10703, 13657, 21461, 150227, 271189, 1898323, 2983079, 20881553]

約数ペア:

[(1, 20881553), (7, 2983079), (11, 1898323), (77, 271189), (139, 150227), (973, 21461), (1529, 13657), (1951, 10703)]