19881290

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{13903}}^1$

素因数の和:13934

約数の個数: 32

約数和(自身を含む): 42045696

約数和(自身を除く): 22164406

約数列:

[1, 2, 5, 10, 11, 13, 22, 26, 55, 65, 110, 130, 143, 286, 715, 1430, 13903, 27806, 69515, 139030, 152933, 180739, 305866, 361478, 764665, 903695, 1529330, 1807390, 1988129, 3976258, 9940645, 19881290]

約数ペア:

[(1, 19881290), (2, 9940645), (5, 3976258), (10, 1988129), (11, 1807390), (13, 1529330), (22, 903695), (26, 764665), (55, 361478), (65, 305866), (110, 180739), (130, 152933), (143, 139030), (286, 69515), (715, 27806), (1430, 13903)]