21100989

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{2089}}^1$

素因数の和:2149

約数の個数: 32

約数和(自身を含む): 35580160

約数和(自身を除く): 14479171

約数列:

[1, 3, 7, 13, 21, 37, 39, 91, 111, 259, 273, 481, 777, 1443, 2089, 3367, 6267, 10101, 14623, 27157, 43869, 77293, 81471, 190099, 231879, 541051, 570297, 1004809, 1623153, 3014427, 7033663, 21100989]

約数ペア:

[(1, 21100989), (3, 7033663), (7, 3014427), (13, 1623153), (21, 1004809), (37, 570297), (39, 541051), (91, 231879), (111, 190099), (259, 81471), (273, 77293), (481, 43869), (777, 27157), (1443, 14623), (2089, 10101), (3367, 6267)]