19711220

素因数分解:

$2^2\times 5^1\times {\mathrm{421}}^1\times {\mathrm{2341}}^1$

素因数の和:2771

約数の個数: 24

約数和(自身を含む): 41509608

約数和(自身を除く): 21798388

約数列:

[1, 2, 4, 5, 10, 20, 421, 842, 1684, 2105, 2341, 4210, 4682, 8420, 9364, 11705, 23410, 46820, 985561, 1971122, 3942244, 4927805, 9855610, 19711220]

約数ペア:

[(1, 19711220), (2, 9855610), (4, 4927805), (5, 3942244), (10, 1971122), (20, 985561), (421, 46820), (842, 23410), (1684, 11705), (2105, 9364), (2341, 8420), (4210, 4682)]