25216821

素因数分解:

$3^2\times 7^2\times {\mathrm{211}}^1\times {\mathrm{271}}^1$

素因数の和:502

約数の個数: 36

約数和(自身を含む): 42729024

約数和(自身を除く): 17512203

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 211, 271, 441, 633, 813, 1477, 1897, 1899, 2439, 4431, 5691, 10339, 13279, 13293, 17073, 31017, 39837, 57181, 93051, 119511, 171543, 400267, 514629, 1200801, 2801869, 3602403, 8405607, 25216821]

約数ペア:

[(1, 25216821), (3, 8405607), (7, 3602403), (9, 2801869), (21, 1200801), (49, 514629), (63, 400267), (147, 171543), (211, 119511), (271, 93051), (441, 57181), (633, 39837), (813, 31017), (1477, 17073), (1897, 13293), (1899, 13279), (2439, 10339), (4431, 5691)]