21856564

素因数分解:

$2^2\times {\mathrm{53}}^1\times {\mathrm{131}}^1\times {\mathrm{787}}^1$

素因数の和:975

約数の個数: 24

約数和(自身を含む): 39318048

約数和(自身を除く): 17461484

約数列:

[1, 2, 4, 53, 106, 131, 212, 262, 524, 787, 1574, 3148, 6943, 13886, 27772, 41711, 83422, 103097, 166844, 206194, 412388, 5464141, 10928282, 21856564]

約数ペア:

[(1, 21856564), (2, 10928282), (4, 5464141), (53, 412388), (106, 206194), (131, 166844), (212, 103097), (262, 83422), (524, 41711), (787, 27772), (1574, 13886), (3148, 6943)]