21778393

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{179}}^1\times {\mathrm{191}}^1$

素因数の和:397

約数の個数: 24

約数和(自身を含む): 27578880

約数和(自身を除く): 5800487

約数列:

[1, 7, 13, 49, 91, 179, 191, 637, 1253, 1337, 2327, 2483, 8771, 9359, 16289, 17381, 34189, 114023, 121667, 239323, 444457, 1675261, 3111199, 21778393]

約数ペア:

[(1, 21778393), (7, 3111199), (13, 1675261), (49, 444457), (91, 239323), (179, 121667), (191, 114023), (637, 34189), (1253, 17381), (1337, 16289), (2327, 9359), (2483, 8771)]