81993990

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{210241}}^1$

素因数の和:210264

約数の個数: 32

約数和(自身を含む): 211923936

約数和(自身を除く): 129929946

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390, 210241, 420482, 630723, 1051205, 1261446, 2102410, 2733133, 3153615, 5466266, 6307230, 8199399, 13665665, 16398798, 27331330, 40996995, 81993990]

約数ペア:

[(1, 81993990), (2, 40996995), (3, 27331330), (5, 16398798), (6, 13665665), (10, 8199399), (13, 6307230), (15, 5466266), (26, 3153615), (30, 2733133), (39, 2102410), (65, 1261446), (78, 1051205), (130, 630723), (195, 420482), (390, 210241)]