20631681

素因数分解:

$3^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{167}}^1$

素因数の和:270

約数の個数: 48

約数和(自身を含む): 35852544

約数和(自身を除く): 15220863

約数列:

[1, 3, 7, 9, 21, 37, 53, 63, 111, 159, 167, 259, 333, 371, 477, 501, 777, 1113, 1169, 1503, 1961, 2331, 3339, 3507, 5883, 6179, 8851, 10521, 13727, 17649, 18537, 26553, 41181, 43253, 55611, 61957, 79659, 123543, 129759, 185871, 327487, 389277, 557613, 982461, 2292409, 2947383, 6877227, 20631681]

約数ペア:

[(1, 20631681), (3, 6877227), (7, 2947383), (9, 2292409), (21, 982461), (37, 557613), (53, 389277), (63, 327487), (111, 185871), (159, 129759), (167, 123543), (259, 79659), (333, 61957), (371, 55611), (477, 43253), (501, 41181), (777, 26553), (1113, 18537), (1169, 17649), (1503, 13727), (1961, 10521), (2331, 8851), (3339, 6179), (3507, 5883)]