21382543

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{83}}^1\times {\mathrm{149}}^1$

素因数の和:271

約数の個数: 32

約数和(自身を含む): 28224000

約数和(自身を除く): 6841457

約数列:

[1, 7, 13, 19, 83, 91, 133, 149, 247, 581, 1043, 1079, 1577, 1729, 1937, 2831, 7553, 11039, 12367, 13559, 19817, 20501, 36803, 86569, 143507, 160771, 234973, 257621, 1125397, 1644811, 3054649, 21382543]

約数ペア:

[(1, 21382543), (7, 3054649), (13, 1644811), (19, 1125397), (83, 257621), (91, 234973), (133, 160771), (149, 143507), (247, 86569), (581, 36803), (1043, 20501), (1079, 19817), (1577, 13559), (1729, 12367), (1937, 11039), (2831, 7553)]