21319240

素因数分解:

$2^3\times 5^1\times {\mathrm{532981}}^1$

素因数の和:532992

約数の個数: 16

約数和(自身を含む): 47968380

約数和(自身を除く): 26649140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 532981, 1065962, 2131924, 2664905, 4263848, 5329810, 10659620, 21319240]

約数ペア:

[(1, 21319240), (2, 10659620), (4, 5329810), (5, 4263848), (8, 2664905), (10, 2131924), (20, 1065962), (40, 532981)]