18886021

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{947}}^1$

素因数の和:1009

約数の個数: 24

約数和(自身を含む): 24640416

約数和(自身を除く): 5754395

約数列:

[1, 7, 11, 37, 49, 77, 259, 407, 539, 947, 1813, 2849, 6629, 10417, 19943, 35039, 46403, 72919, 245273, 385429, 510433, 1716911, 2698003, 18886021]

約数ペア:

[(1, 18886021), (7, 2698003), (11, 1716911), (37, 510433), (49, 385429), (77, 245273), (259, 72919), (407, 46403), (539, 35039), (947, 19943), (1813, 10417), (2849, 6629)]