21354081

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{491}}^1$

素因数の和:629

約数の個数: 32

約数和(自身を含む): 34636800

約数和(自身を除く): 13282719

約数列:

[1, 3, 7, 19, 21, 57, 109, 133, 327, 399, 491, 763, 1473, 2071, 2289, 3437, 6213, 9329, 10311, 14497, 27987, 43491, 53519, 65303, 160557, 195909, 374633, 1016861, 1123899, 3050583, 7118027, 21354081]

約数ペア:

[(1, 21354081), (3, 7118027), (7, 3050583), (19, 1123899), (21, 1016861), (57, 374633), (109, 195909), (133, 160557), (327, 65303), (399, 53519), (491, 43491), (763, 27987), (1473, 14497), (2071, 10311), (2289, 9329), (3437, 6213)]