21000992138

素因数分解:

$2^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{34885369}}^1$

素因数の和:34885421

約数の個数: 16

約数和(自身を含む): 36838950720

約数和(自身を除く): 15837958582

約数列:

[1, 2, 7, 14, 43, 86, 301, 602, 34885369, 69770738, 244197583, 488395166, 1500070867, 3000141734, 10500496069, 21000992138]

約数ペア:

[(1, 21000992138), (2, 10500496069), (7, 3000141734), (14, 1500070867), (43, 488395166), (86, 244197583), (301, 69770738), (602, 34885369)]