20778915

素因数分解:

$3^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{59}}^1\times {\mathrm{443}}^1$

素因数の和:563

約数の個数: 32

約数和(自身を含む): 34525440

約数和(自身を除く): 13746525

約数列:

[1, 3, 5, 15, 53, 59, 159, 177, 265, 295, 443, 795, 885, 1329, 2215, 3127, 6645, 9381, 15635, 23479, 26137, 46905, 70437, 78411, 117395, 130685, 352185, 392055, 1385261, 4155783, 6926305, 20778915]

約数ペア:

[(1, 20778915), (3, 6926305), (5, 4155783), (15, 1385261), (53, 392055), (59, 352185), (159, 130685), (177, 117395), (265, 78411), (295, 70437), (443, 46905), (795, 26137), (885, 23479), (1329, 15635), (2215, 9381), (3127, 6645)]