21437541

素因数分解:

$3^4\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{311}}^1$

素因数の和:383

約数の個数: 40

約数和(自身を含む): 34429824

約数和(自身を除く): 12992283

約数列:

[1, 3, 9, 23, 27, 37, 69, 81, 111, 207, 311, 333, 621, 851, 933, 999, 1863, 2553, 2799, 2997, 7153, 7659, 8397, 11507, 21459, 22977, 25191, 34521, 64377, 68931, 103563, 193131, 264661, 310689, 579393, 793983, 932067, 2381949, 7145847, 21437541]

約数ペア:

[(1, 21437541), (3, 7145847), (9, 2381949), (23, 932067), (27, 793983), (37, 579393), (69, 310689), (81, 264661), (111, 193131), (207, 103563), (311, 68931), (333, 64377), (621, 34521), (851, 25191), (933, 22977), (999, 21459), (1863, 11507), (2553, 8397), (2799, 7659), (2997, 7153)]