20112005

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{61}}^2$

素因数の和:197

約数の個数: 24

約数和(自身を含む): 26148096

約数和(自身を除く): 6036091

約数列:

[1, 5, 23, 47, 61, 115, 235, 305, 1081, 1403, 2867, 3721, 5405, 7015, 14335, 18605, 65941, 85583, 174887, 329705, 427915, 874435, 4022401, 20112005]

約数ペア:

[(1, 20112005), (5, 4022401), (23, 874435), (47, 427915), (61, 329705), (115, 174887), (235, 85583), (305, 65941), (1081, 18605), (1403, 14335), (2867, 7015), (3721, 5405)]