19809878

素因数分解:

$2^1\times {\mathrm{11}}^2\times {\mathrm{109}}^1\times {\mathrm{751}}^1$

素因数の和:884

約数の個数: 24

約数和(自身を含む): 33005280

約数和(自身を除く): 13195402

約数列:

[1, 2, 11, 22, 109, 121, 218, 242, 751, 1199, 1502, 2398, 8261, 13189, 16522, 26378, 81859, 90871, 163718, 181742, 900449, 1800898, 9904939, 19809878]

約数ペア:

[(1, 19809878), (2, 9904939), (11, 1800898), (22, 900449), (109, 181742), (121, 163718), (218, 90871), (242, 81859), (751, 26378), (1199, 16522), (1502, 13189), (2398, 8261)]