21205197

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{9539}}^1$

素因数の和:9577

約数の個数: 24

約数和(自身を含む): 34725600

約数和(自身を除く): 13520403

約数列:

[1, 3, 9, 13, 19, 39, 57, 117, 171, 247, 741, 2223, 9539, 28617, 85851, 124007, 181241, 372021, 543723, 1116063, 1631169, 2356133, 7068399, 21205197]

約数ペア:

[(1, 21205197), (3, 7068399), (9, 2356133), (13, 1631169), (19, 1116063), (39, 543723), (57, 372021), (117, 181241), (171, 124007), (247, 85851), (741, 28617), (2223, 9539)]