20768995

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{251}}^1$

素因数の和:355

約数の個数: 32

約数和(自身を含む): 28788480

約数和(自身を除く): 8019485

約数列:

[1, 5, 13, 19, 65, 67, 95, 247, 251, 335, 871, 1235, 1255, 1273, 3263, 4355, 4769, 6365, 16315, 16549, 16817, 23845, 61997, 82745, 84085, 218621, 309985, 319523, 1093105, 1597615, 4153799, 20768995]

約数ペア:

[(1, 20768995), (5, 4153799), (13, 1597615), (19, 1093105), (65, 319523), (67, 309985), (95, 218621), (247, 84085), (251, 82745), (335, 61997), (871, 23845), (1235, 16817), (1255, 16549), (1273, 16315), (3263, 6365), (4355, 4769)]