21392558

素因数分解:

$2^1\times {\mathrm{11}}^2\times {\mathrm{109}}^1\times {\mathrm{811}}^1$

素因数の和:944

約数の個数: 24

約数和(自身を含む): 35638680

約数和(自身を除く): 14246122

約数列:

[1, 2, 11, 22, 109, 121, 218, 242, 811, 1199, 1622, 2398, 8921, 13189, 17842, 26378, 88399, 98131, 176798, 196262, 972389, 1944778, 10696279, 21392558]

約数ペア:

[(1, 21392558), (2, 10696279), (11, 1944778), (22, 972389), (109, 196262), (121, 176798), (218, 98131), (242, 88399), (811, 26378), (1199, 17842), (1622, 13189), (2398, 8921)]