19987418

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{22159}}^1$

素因数の和:22213

約数の個数: 16

約数和(自身を含む): 33505920

約数和(自身を除く): 13518502

約数列:

[1, 2, 11, 22, 41, 82, 451, 902, 22159, 44318, 243749, 487498, 908519, 1817038, 9993709, 19987418]

約数ペア:

[(1, 19987418), (2, 9993709), (11, 1817038), (22, 908519), (41, 487498), (82, 243749), (451, 44318), (902, 22159)]