21055138

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{151}}^1\times {\mathrm{173}}^1$

素因数の和:370

約数の個数: 32

約数和(自身を含む): 35546112

約数和(自身を除く): 14490974

約数列:

[1, 2, 13, 26, 31, 62, 151, 173, 302, 346, 403, 806, 1963, 2249, 3926, 4498, 4681, 5363, 9362, 10726, 26123, 52246, 60853, 69719, 121706, 139438, 339599, 679198, 809813, 1619626, 10527569, 21055138]

約数ペア:

[(1, 21055138), (2, 10527569), (13, 1619626), (26, 809813), (31, 679198), (62, 339599), (151, 139438), (173, 121706), (302, 69719), (346, 60853), (403, 52246), (806, 26123), (1963, 10726), (2249, 9362), (3926, 5363), (4498, 4681)]