21221795

素因数分解:

$5^1\times 7^1\times {\mathrm{223}}^1\times {\mathrm{2719}}^1$

素因数の和:2954

約数の個数: 16

約数和(自身を含む): 29245440

約数和(自身を除く): 8023645

約数列:

[1, 5, 7, 35, 223, 1115, 1561, 2719, 7805, 13595, 19033, 95165, 606337, 3031685, 4244359, 21221795]

約数ペア:

[(1, 21221795), (5, 4244359), (7, 3031685), (35, 606337), (223, 95165), (1115, 19033), (1561, 13595), (2719, 7805)]