21159945

素因数分解:

$3^2\times 5^1\times {\mathrm{431}}^1\times {\mathrm{1091}}^1$

素因数の和:1533

約数の個数: 24

約数和(自身を含む): 36796032

約数和(自身を除く): 15636087

約数列:

[1, 3, 5, 9, 15, 45, 431, 1091, 1293, 2155, 3273, 3879, 5455, 6465, 9819, 16365, 19395, 49095, 470221, 1410663, 2351105, 4231989, 7053315, 21159945]

約数ペア:

[(1, 21159945), (3, 7053315), (5, 4231989), (9, 2351105), (15, 1410663), (45, 470221), (431, 49095), (1091, 19395), (1293, 16365), (2155, 9819), (3273, 6465), (3879, 5455)]