20991542

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{3863}}^1$

素因数の和:3908

約数の個数: 32

約数和(自身を含む): 38949120

約数和(自身を除く): 17957578

約数列:

[1, 2, 11, 13, 19, 22, 26, 38, 143, 209, 247, 286, 418, 494, 2717, 3863, 5434, 7726, 42493, 50219, 73397, 84986, 100438, 146794, 552409, 807367, 954161, 1104818, 1614734, 1908322, 10495771, 20991542]

約数ペア:

[(1, 20991542), (2, 10495771), (11, 1908322), (13, 1614734), (19, 1104818), (22, 954161), (26, 807367), (38, 552409), (143, 146794), (209, 100438), (247, 84986), (286, 73397), (418, 50219), (494, 42493), (2717, 7726), (3863, 5434)]