21378526

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{313}}^1$

素因数の和:436

約数の個数: 32

約数和(自身を含む): 36082368

約数和(自身を除く): 14703842

約数列:

[1, 2, 13, 26, 37, 71, 74, 142, 313, 481, 626, 923, 962, 1846, 2627, 4069, 5254, 8138, 11581, 22223, 23162, 34151, 44446, 68302, 150553, 288899, 301106, 577798, 822251, 1644502, 10689263, 21378526]

約数ペア:

[(1, 21378526), (2, 10689263), (13, 1644502), (26, 822251), (37, 577798), (71, 301106), (74, 288899), (142, 150553), (313, 68302), (481, 44446), (626, 34151), (923, 23162), (962, 22223), (1846, 11581), (2627, 8138), (4069, 5254)]