20978727

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{197}}^1\times {\mathrm{461}}^1$

素因数の和:679

約数の個数: 32

約数和(自身を含む): 35126784

約数和(自身を除く): 14148057

約数列:

[1, 3, 7, 11, 21, 33, 77, 197, 231, 461, 591, 1379, 1383, 2167, 3227, 4137, 5071, 6501, 9681, 15169, 15213, 35497, 45507, 90817, 106491, 272451, 635719, 998987, 1907157, 2996961, 6992909, 20978727]

約数ペア:

[(1, 20978727), (3, 6992909), (7, 2996961), (11, 1907157), (21, 998987), (33, 635719), (77, 272451), (197, 106491), (231, 90817), (461, 45507), (591, 35497), (1379, 15213), (1383, 15169), (2167, 9681), (3227, 6501), (4137, 5071)]