21206223

素因数分解:

$3^2\times {\mathrm{19}}^2\times {\mathrm{61}}^1\times {\mathrm{107}}^1$

素因数の和:212

約数の個数: 36

約数和(自身を含む): 33165288

約数和(自身を除く): 11959065

約数列:

[1, 3, 9, 19, 57, 61, 107, 171, 183, 321, 361, 549, 963, 1083, 1159, 2033, 3249, 3477, 6099, 6527, 10431, 18297, 19581, 22021, 38627, 58743, 66063, 115881, 124013, 198189, 347643, 372039, 1116117, 2356247, 7068741, 21206223]

約数ペア:

[(1, 21206223), (3, 7068741), (9, 2356247), (19, 1116117), (57, 372039), (61, 347643), (107, 198189), (171, 124013), (183, 115881), (321, 66063), (361, 58743), (549, 38627), (963, 22021), (1083, 19581), (1159, 18297), (2033, 10431), (3249, 6527), (3477, 6099)]