20979915

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{2957}}^1$

素因数の和:3019

約数の個数: 32

約数和(自身を含む): 37483776

約数和(自身を除く): 16503861

約数列:

[1, 3, 5, 11, 15, 33, 43, 55, 129, 165, 215, 473, 645, 1419, 2365, 2957, 7095, 8871, 14785, 32527, 44355, 97581, 127151, 162635, 381453, 487905, 635755, 1398661, 1907265, 4195983, 6993305, 20979915]

約数ペア:

[(1, 20979915), (3, 6993305), (5, 4195983), (11, 1907265), (15, 1398661), (33, 635755), (43, 487905), (55, 381453), (129, 162635), (165, 127151), (215, 97581), (473, 44355), (645, 32527), (1419, 14785), (2365, 8871), (2957, 7095)]