20209511

素因数分解:

$7^2\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{157}}^1$

素因数の和:279

約数の個数: 24

約数和(自身を含む): 24640416

約数和(自身を除く): 4430905

約数列:

[1, 7, 37, 49, 71, 157, 259, 497, 1099, 1813, 2627, 3479, 5809, 7693, 11147, 18389, 40663, 78029, 128723, 284641, 412439, 546203, 2887073, 20209511]

約数ペア:

[(1, 20209511), (7, 2887073), (37, 546203), (49, 412439), (71, 284641), (157, 128723), (259, 78029), (497, 40663), (1099, 18389), (1813, 11147), (2627, 7693), (3479, 5809)]