640938981

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{405401}}^1$

素因数の和:405452

約数の個数: 16

約数和(自身を含む): 934046208

約数和(自身を除く): 293107227

約数列:

[1, 3, 17, 31, 51, 93, 527, 1581, 405401, 1216203, 6891817, 12567431, 20675451, 37702293, 213646327, 640938981]

約数ペア:

[(1, 640938981), (3, 213646327), (17, 37702293), (31, 20675451), (51, 12567431), (93, 6891817), (527, 1216203), (1581, 405401)]