20167820

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^2\times {\mathrm{271}}^1$

素因数の和:402

約数の個数: 36

約数和(自身を含む): 43216992

約数和(自身を除く): 23049172

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 271, 305, 542, 610, 1084, 1220, 1355, 2710, 3721, 5420, 7442, 14884, 16531, 18605, 33062, 37210, 66124, 74420, 82655, 165310, 330620, 1008391, 2016782, 4033564, 5041955, 10083910, 20167820]

約数ペア:

[(1, 20167820), (2, 10083910), (4, 5041955), (5, 4033564), (10, 2016782), (20, 1008391), (61, 330620), (122, 165310), (244, 82655), (271, 74420), (305, 66124), (542, 37210), (610, 33062), (1084, 18605), (1220, 16531), (1355, 14884), (2710, 7442), (3721, 5420)]