21240651

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{79}}^1\times {\mathrm{89}}^1$

素因数の和:243

約数の個数: 32

約数和(自身を含む): 31104000

約数和(自身を除く): 9863349

約数列:

[1, 3, 19, 53, 57, 79, 89, 159, 237, 267, 1007, 1501, 1691, 3021, 4187, 4503, 4717, 5073, 7031, 12561, 14151, 21093, 79553, 89623, 133589, 238659, 268869, 372643, 400767, 1117929, 7080217, 21240651]

約数ペア:

[(1, 21240651), (3, 7080217), (19, 1117929), (53, 400767), (57, 372643), (79, 268869), (89, 238659), (159, 133589), (237, 89623), (267, 79553), (1007, 21093), (1501, 14151), (1691, 12561), (3021, 7031), (4187, 5073), (4503, 4717)]