20921855997

素因数分解:

$3^1\times 7^2\times {\mathrm{109}}^1\times {\mathrm{1305739}}^1$

素因数の和:1305865

約数の個数: 24

約数和(自身を含む): 32747959200

約数和(自身を除く): 11826103203

約数列:

[1, 3, 7, 21, 49, 109, 147, 327, 763, 2289, 5341, 16023, 1305739, 3917217, 9140173, 27420519, 63981211, 142325551, 191943633, 426976653, 996278857, 2988836571, 6973951999, 20921855997]

約数ペア:

[(1, 20921855997), (3, 6973951999), (7, 2988836571), (21, 996278857), (49, 426976653), (109, 191943633), (147, 142325551), (327, 63981211), (763, 27420519), (2289, 9140173), (5341, 3917217), (16023, 1305739)]