21069711

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{1783}}^1$

素因数の和:1903

約数の個数: 24

約数和(自身を含む): 33118176

約数和(自身を除く): 12048465

約数列:

[1, 3, 9, 13, 39, 101, 117, 303, 909, 1313, 1783, 3939, 5349, 11817, 16047, 23179, 69537, 180083, 208611, 540249, 1620747, 2341079, 7023237, 21069711]

約数ペア:

[(1, 21069711), (3, 7023237), (9, 2341079), (13, 1620747), (39, 540249), (101, 208611), (117, 180083), (303, 69537), (909, 23179), (1313, 16047), (1783, 11817), (3939, 5349)]