21392469

素因数分解:

$3^2\times 7^2\times {\mathrm{179}}^1\times {\mathrm{271}}^1$

素因数の和:470

約数の個数: 36

約数和(自身を含む): 36279360

約数和(自身を除く): 14886891

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 179, 271, 441, 537, 813, 1253, 1611, 1897, 2439, 3759, 5691, 8771, 11277, 13279, 17073, 26313, 39837, 48509, 78939, 119511, 145527, 339563, 436581, 1018689, 2376941, 3056067, 7130823, 21392469]

約数ペア:

[(1, 21392469), (3, 7130823), (7, 3056067), (9, 2376941), (21, 1018689), (49, 436581), (63, 339563), (147, 145527), (179, 119511), (271, 78939), (441, 48509), (537, 39837), (813, 26313), (1253, 17073), (1611, 13279), (1897, 11277), (2439, 8771), (3759, 5691)]