1638820

素因数分解:

$2^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{1223}}^1$

素因数の和:1299

約数の個数: 24

約数和(自身を含む): 3495744

約数和(自身を除く): 1856924

約数列:

[1, 2, 4, 5, 10, 20, 67, 134, 268, 335, 670, 1223, 1340, 2446, 4892, 6115, 12230, 24460, 81941, 163882, 327764, 409705, 819410, 1638820]

約数ペア:

[(1, 1638820), (2, 819410), (4, 409705), (5, 327764), (10, 163882), (20, 81941), (67, 24460), (134, 12230), (268, 6115), (335, 4892), (670, 2446), (1223, 1340)]