19943990

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{7883}}^1$

素因数の和:7924

約数の個数: 32

約数和(自身を含む): 40870656

約数和(自身を除く): 20926666

約数列:

[1, 2, 5, 10, 11, 22, 23, 46, 55, 110, 115, 230, 253, 506, 1265, 2530, 7883, 15766, 39415, 78830, 86713, 173426, 181309, 362618, 433565, 867130, 906545, 1813090, 1994399, 3988798, 9971995, 19943990]

約数ペア:

[(1, 19943990), (2, 9971995), (5, 3988798), (10, 1994399), (11, 1813090), (22, 906545), (23, 867130), (46, 433565), (55, 362618), (110, 181309), (115, 173426), (230, 86713), (253, 78830), (506, 39415), (1265, 15766), (2530, 7883)]