21978670

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{313981}}^1$

素因数の和:313995

約数の個数: 16

約数和(自身を含む): 45213408

約数和(自身を除く): 23234738

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 313981, 627962, 1569905, 2197867, 3139810, 4395734, 10989335, 21978670]

約数ペア:

[(1, 21978670), (2, 10989335), (5, 4395734), (7, 3139810), (10, 2197867), (14, 1569905), (35, 627962), (70, 313981)]