216919913

素因数分解:

$7^2\times {\mathrm{29}}^1\times {\mathrm{293}}^1\times {\mathrm{521}}^1$

素因数の和:857

約数の個数: 24

約数和(自身を含む): 262430280

約数和(自身を除く): 45510367

約数列:

[1, 7, 29, 49, 203, 293, 521, 1421, 2051, 3647, 8497, 14357, 15109, 25529, 59479, 105763, 152653, 416353, 740341, 1068571, 4426937, 7479997, 30988559, 216919913]

約数ペア:

[(1, 216919913), (7, 30988559), (29, 7479997), (49, 4426937), (203, 1068571), (293, 740341), (521, 416353), (1421, 152653), (2051, 105763), (3647, 59479), (8497, 25529), (14357, 15109)]