21740719

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{587}}^1$

素因数の和:655

約数の個数: 32

約数和(自身を含む): 30030336

約数和(自身を除く): 8289617

約数列:

[1, 7, 11, 13, 37, 77, 91, 143, 259, 407, 481, 587, 1001, 2849, 3367, 4109, 5291, 6457, 7631, 21719, 37037, 45199, 53417, 83941, 152033, 238909, 282347, 587587, 1672363, 1976429, 3105817, 21740719]

約数ペア:

[(1, 21740719), (7, 3105817), (11, 1976429), (13, 1672363), (37, 587587), (77, 282347), (91, 238909), (143, 152033), (259, 83941), (407, 53417), (481, 45199), (587, 37037), (1001, 21719), (2849, 7631), (3367, 6457), (4109, 5291)]