1978990

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{1171}}^1$

素因数の和:1204

約数の個数: 24

約数和(自身を含む): 3860568

約数和(自身を除く): 1881578

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845, 1171, 1690, 2342, 5855, 11710, 15223, 30446, 76115, 152230, 197899, 395798, 989495, 1978990]

約数ペア:

[(1, 1978990), (2, 989495), (5, 395798), (10, 197899), (13, 152230), (26, 76115), (65, 30446), (130, 15223), (169, 11710), (338, 5855), (845, 2342), (1171, 1690)]