21108747

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{191}}^1\times {\mathrm{197}}^1$

素因数の和:419

約数の個数: 32

約数和(自身を含む): 32845824

約数和(自身を除く): 11737077

約数列:

[1, 3, 11, 17, 33, 51, 187, 191, 197, 561, 573, 591, 2101, 2167, 3247, 3349, 6303, 6501, 9741, 10047, 35717, 36839, 37627, 107151, 110517, 112881, 413897, 639659, 1241691, 1918977, 7036249, 21108747]

約数ペア:

[(1, 21108747), (3, 7036249), (11, 1918977), (17, 1241691), (33, 639659), (51, 413897), (187, 112881), (191, 110517), (197, 107151), (561, 37627), (573, 36839), (591, 35717), (2101, 10047), (2167, 9741), (3247, 6501), (3349, 6303)]