20728827

素因数分解:

$3^2\times 7^1\times {\mathrm{151}}^1\times {\mathrm{2179}}^1$

素因数の和:2343

約数の個数: 24

約数和(自身を含む): 34461440

約数和(自身を除く): 13732613

約数列:

[1, 3, 7, 9, 21, 63, 151, 453, 1057, 1359, 2179, 3171, 6537, 9513, 15253, 19611, 45759, 137277, 329029, 987087, 2303203, 2961261, 6909609, 20728827]

約数ペア:

[(1, 20728827), (3, 6909609), (7, 2961261), (9, 2303203), (21, 987087), (63, 329029), (151, 137277), (453, 45759), (1057, 19611), (1359, 15253), (2179, 9513), (3171, 6537)]