21316988

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{1033}}^1$

素因数の和:1122

約数の個数: 48

約数和(自身を含む): 47249664

約数和(自身を除く): 25932676

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 67, 77, 134, 154, 268, 308, 469, 737, 938, 1033, 1474, 1876, 2066, 2948, 4132, 5159, 7231, 10318, 11363, 14462, 20636, 22726, 28924, 45452, 69211, 79541, 138422, 159082, 276844, 318164, 484477, 761321, 968954, 1522642, 1937908, 3045284, 5329247, 10658494, 21316988]

約数ペア:

[(1, 21316988), (2, 10658494), (4, 5329247), (7, 3045284), (11, 1937908), (14, 1522642), (22, 968954), (28, 761321), (44, 484477), (67, 318164), (77, 276844), (134, 159082), (154, 138422), (268, 79541), (308, 69211), (469, 45452), (737, 28924), (938, 22726), (1033, 20636), (1474, 14462), (1876, 11363), (2066, 10318), (2948, 7231), (4132, 5159)]