20150920

素因数分解:

$2^3\times 5^1\times {\mathrm{67}}^1\times {\mathrm{73}}^1\times {\mathrm{103}}^1$

素因数の和:254

約数の個数: 64

約数和(自身を含む): 47099520

約数和(自身を除く): 26948600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 67, 73, 103, 134, 146, 206, 268, 292, 335, 365, 412, 515, 536, 584, 670, 730, 824, 1030, 1340, 1460, 2060, 2680, 2920, 4120, 4891, 6901, 7519, 9782, 13802, 15038, 19564, 24455, 27604, 30076, 34505, 37595, 39128, 48910, 55208, 60152, 69010, 75190, 97820, 138020, 150380, 195640, 276040, 300760, 503773, 1007546, 2015092, 2518865, 4030184, 5037730, 10075460, 20150920]

約数ペア:

[(1, 20150920), (2, 10075460), (4, 5037730), (5, 4030184), (8, 2518865), (10, 2015092), (20, 1007546), (40, 503773), (67, 300760), (73, 276040), (103, 195640), (134, 150380), (146, 138020), (206, 97820), (268, 75190), (292, 69010), (335, 60152), (365, 55208), (412, 48910), (515, 39128), (536, 37595), (584, 34505), (670, 30076), (730, 27604), (824, 24455), (1030, 19564), (1340, 15038), (1460, 13802), (2060, 9782), (2680, 7519), (2920, 6901), (4120, 4891)]