21031479

素因数分解:

$3^2\times 7^1\times {\mathrm{167}}^1\times {\mathrm{1999}}^1$

素因数の和:2179

約数の個数: 24

約数和(自身を含む): 34944000

約数和(自身を除く): 13912521

約数列:

[1, 3, 7, 9, 21, 63, 167, 501, 1169, 1503, 1999, 3507, 5997, 10521, 13993, 17991, 41979, 125937, 333833, 1001499, 2336831, 3004497, 7010493, 21031479]

約数ペア:

[(1, 21031479), (3, 7010493), (7, 3004497), (9, 2336831), (21, 1001499), (63, 333833), (167, 125937), (501, 41979), (1169, 17991), (1503, 13993), (1999, 10521), (3507, 5997)]