81666291

素因数分解:

$3^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{19157}}^1$

素因数の和:19203

約数の個数: 24

約数和(自身を含む): 131040720

約数和(自身を除く): 49374429

約数列:

[1, 3, 7, 21, 29, 49, 87, 147, 203, 609, 1421, 4263, 19157, 57471, 134099, 402297, 555553, 938693, 1666659, 2816079, 3888871, 11666613, 27222097, 81666291]

約数ペア:

[(1, 81666291), (3, 27222097), (7, 11666613), (21, 3888871), (29, 2816079), (49, 1666659), (87, 938693), (147, 555553), (203, 402297), (609, 134099), (1421, 57471), (4263, 19157)]