20389985

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{211}}^1\times {\mathrm{251}}^1$

素因数の和:485

約数の個数: 32

約数和(自身を含む): 30772224

約数和(自身を除く): 10382239

約数列:

[1, 5, 7, 11, 35, 55, 77, 211, 251, 385, 1055, 1255, 1477, 1757, 2321, 2761, 7385, 8785, 11605, 13805, 16247, 19327, 52961, 81235, 96635, 264805, 370727, 582571, 1853635, 2912855, 4077997, 20389985]

約数ペア:

[(1, 20389985), (5, 4077997), (7, 2912855), (11, 1853635), (35, 582571), (55, 370727), (77, 264805), (211, 96635), (251, 81235), (385, 52961), (1055, 19327), (1255, 16247), (1477, 13805), (1757, 11605), (2321, 8785), (2761, 7385)]