21667780

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{15259}}^1$

素因数の和:15339

約数の個数: 24

約数和(自身を含む): 46146240

約数和(自身を除く): 24478460

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 15259, 30518, 61036, 76295, 152590, 305180, 1083389, 2166778, 4333556, 5416945, 10833890, 21667780]

約数ペア:

[(1, 21667780), (2, 10833890), (4, 5416945), (5, 4333556), (10, 2166778), (20, 1083389), (71, 305180), (142, 152590), (284, 76295), (355, 61036), (710, 30518), (1420, 15259)]