21293545

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{883}}^1$

素因数の和:961

約数の個数: 32

約数和(自身を含む): 32078592

約数和(自身を除く): 10785047

約数列:

[1, 5, 7, 13, 35, 53, 65, 91, 265, 371, 455, 689, 883, 1855, 3445, 4415, 4823, 6181, 11479, 24115, 30905, 46799, 57395, 80353, 233995, 327593, 401765, 608387, 1637965, 3041935, 4258709, 21293545]

約数ペア:

[(1, 21293545), (5, 4258709), (7, 3041935), (13, 1637965), (35, 608387), (53, 401765), (65, 327593), (91, 233995), (265, 80353), (371, 57395), (455, 46799), (689, 30905), (883, 24115), (1855, 11479), (3445, 6181), (4415, 4823)]