21338695

素因数分解:

$5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{277}}^1$

素因数の和:391

約数の個数: 32

約数和(自身を含む): 30744576

約数和(自身を除く): 9405881

約数列:

[1, 5, 7, 31, 35, 71, 155, 217, 277, 355, 497, 1085, 1385, 1939, 2201, 2485, 8587, 9695, 11005, 15407, 19667, 42935, 60109, 77035, 98335, 137669, 300545, 609677, 688345, 3048385, 4267739, 21338695]

約数ペア:

[(1, 21338695), (5, 4267739), (7, 3048385), (31, 688345), (35, 609677), (71, 300545), (155, 137669), (217, 98335), (277, 77035), (355, 60109), (497, 42935), (1085, 19667), (1385, 15407), (1939, 11005), (2201, 9695), (2485, 8587)]