21742315

素因数分解:

$5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{691}}^1$

素因数の和:763

約数の個数: 32

約数和(自身を含む): 31887360

約数和(自身を除く): 10145045

約数列:

[1, 5, 7, 29, 31, 35, 145, 155, 203, 217, 691, 899, 1015, 1085, 3455, 4495, 4837, 6293, 20039, 21421, 24185, 31465, 100195, 107105, 140273, 149947, 621209, 701365, 749735, 3106045, 4348463, 21742315]

約数ペア:

[(1, 21742315), (5, 4348463), (7, 3106045), (29, 749735), (31, 701365), (35, 621209), (145, 149947), (155, 140273), (203, 107105), (217, 100195), (691, 31465), (899, 24185), (1015, 21421), (1085, 20039), (3455, 6293), (4495, 4837)]