21002891

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{149}}^1\times {\mathrm{1549}}^1$

素因数の和:1718

約数の個数: 16

約数和(自身を含む): 26040000

約数和(自身を除く): 5037109

約数列:

[1, 7, 13, 91, 149, 1043, 1549, 1937, 10843, 13559, 20137, 140959, 230801, 1615607, 3000413, 21002891]

約数ペア:

[(1, 21002891), (7, 3000413), (13, 1615607), (91, 230801), (149, 140959), (1043, 20137), (1549, 13559), (1937, 10843)]