21791315

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{1019}}^1$

素因数の和:1091

約数の個数: 32

約数和(自身を含む): 32901120

約数和(自身を除く): 11109805

約数列:

[1, 5, 7, 13, 35, 47, 65, 91, 235, 329, 455, 611, 1019, 1645, 3055, 4277, 5095, 7133, 13247, 21385, 35665, 47893, 66235, 92729, 239465, 335251, 463645, 622609, 1676255, 3113045, 4358263, 21791315]

約数ペア:

[(1, 21791315), (5, 4358263), (7, 3113045), (13, 1676255), (35, 622609), (47, 463645), (65, 335251), (91, 239465), (235, 92729), (329, 66235), (455, 47893), (611, 35665), (1019, 21385), (1645, 13247), (3055, 7133), (4277, 5095)]